Roy's List is here! Identification and care of stomatopods. - Page 3

Gonodactylus · 03/07/2007, 09:13 AM

Most of the studies that we have on squillids are for species that are in warmer waters. How seasonally cold waters such as those on the northeastern seaboard affect growth and age are unknown, but I'm sure it must slow things down considerably. Most stomatopod females can either molt or reproduce - they can't do both at the same time. Once egg production starts, that will also slow growth. Squilla empusa in the northeast is a seasonal breeder and I think only produces one or two clutchs a year (I could be wrong). What we don't know is if they molt frequently when they are not reproducing. Sorry to rattle on about this, but the bottom line is we don't have the data to make an informed guess.

Roy

michelle .t · 05/05/2007, 10:43 AM

roy i,v looked at your list. the mantis i,ve seen in my tank dosn't have the same color as any of these it is dark blue w/electric blue stripes on front legs sort of like the blue hermits its eaten.its a smasher tho seen it hitting rock and chipping out a larger hole it is about 1 in. long can u tell me what it is...

Pea-brain · 05/05/2007, 02:21 PM

I've noticed you have TBS live rock. It is likely an N. wennerae. Look at the list. I believe there is a blue one on it.....Great species, ges about 3 inches, pretty active, though it varies between individuals.

michelle .t · 05/06/2007, 12:59 PM

thanks a bunch not sure if i want to keep it or not hmmm...but must catch it first lol got an empty tank but not sure if i want to make another saltwater tank so soon before i'm usedto taking care of the first one

Pea-brain · 05/06/2007, 06:10 PM

N. wenneraeare super hard. Just get a 10 galon, a glass cover an use some cured live rock and some sand from an established tank. pick up a can of freeze dried krill, a pack of frozen shrimp, and feed every other day or so. Feed live hard foods (snails, hermits) maybe once a month, and soak in selcon once a week. Do a 10% water change every week. easy.

justinl · 05/07/2007, 12:51 AM

lol peabrain, that was a rushed post! lol michelle, he meant the wennies are super HARDY and they certainly are. he also meant for you to soak the frozens in selcon. the live food you just throw in the tank and let the mantis hunt. I love watching my G. smithii destroy crabs. make sure the live isn't big enough to harm the mantis though... ive seen a one eyed mantis before because of this.

btw, i don't like freeze dried stuff. i like to stick to frozens. just a personal preference.

btw michelle, with a bit more experience you could even start a reef tank... but where? why in the mantis tank of course silly! mantis among corals make amazing pics and it really is an amazing thing... fish don't even compare. just keep it in mind for later.

SoMoney · 07/18/2007, 04:32 PM

Nice list,
I have a general question regarding the common field, "Aquarium size (adult): ##L". How do we know Neogonodactylus wennerae need at least 20L for instance? From pictures, Video, and general observations, I hardly ever see these Mantis shrimp leave there caves. When they do leave there lair, it's rarely for more than 30 seconds and then they zip right back into there tiny burrow. I don't mean to sound mean or anything like that but whats the 20L for?

Gonodactylus · 07/18/2007, 05:01 PM

My recommendation for aquarium size is just that - a recommendation based on my experience keeping these animals, what I know about their behavior in the field, physiological tolerances and other factors such as their tendency to bury food and molt skins. If you want, you can keep an adult N. wennerae in half a liter of water changed every four days (I have about 50 being held in the lab just that way.) However, if you want an animal that grows at a normal rate, reproduces and behaves as they do in the field, then a stable, larger tank is required.

N. wennerae/bredini has been my primary research animal since I first worked on it in Bermuda 40 years ago. I have collected probably close to 100,000 of them, spent thousands of hours watching their behavior and have hundreds of hours of video taken in the field. While when maintained in a small aquarium and provided food at or near the cavity, they may remain secretive. In the field where food (and mates) are more scarce and must be searched for, adult N. wennerae make several ftrips away from the cavity starting just after dawn, slowing at mid-day and picking up towards sunset. Cavities are always closed by dusk and opened at dawn.

Actually, behavior in an aquarium doesn't really look much like field activity until the animals are housed in a really large tank, but a 10 gal is a nice compromise that promotes good water quality and gives the animal room to move about.

Can they be kept in a smaller system? Sure. Will they behave as they would in the field? Probably not. Will they they grow and reproduce as much as in the field and live as long? No. Are they as happy? I have no idea.

SoMoney · 07/18/2007, 05:28 PM

Thanks! I find mantis so enjoyable to watch. I'm just trying to get into a N.wennerae or the larger O.scyllarus's head to figure out what they want and if there needs differ much with regards to tank size (Understood, some use rocks, some dig tunnels, etc). It sounds like there kind of like us, Sleep, Feed & Breed. =)

AAASINGER · 07/30/2007, 01:50 PM

Great!!! job!!!

Thanks

mrotakki · 08/07/2007, 10:39 PM

I used to keep a fairly small mantis in an old 20 gallon tank, but had to move a few years back. I ended up giving it away - but recently started back up and picked up a larger mantis from the local store.

So far it's taken a liking to the cave that it has adopted, and goes so far as to peer out and guard it unless someone walks by (at which point it ducks back in and peers out cautiously).

The store had no firm ID and I've IDed it rather haphazardly as a G. platysoma and was hoping I could get a more firm ID of the specimen. I've got a couple of photos here and here . I'll attempt some more photos relatively soon if these are insufficient for identification.

Any help would be fantastic! Currently I put in a "fresh" round of hermit crabs, astrea snails and a couple mithrax crabs once I notice most are "missing" or the telltale pile of debris and discarded shells outside the burrow gets fairly large. I've also been feeding the mantis freeze-dried krill every now and again by wedging pieces around the tank. They disappear after fifteen or so minutes, so I can only assume the mantis is taking them. If there's anything else you'd recommend, I'd love to hear it.

Thanks!

Gonodactylus · 08/07/2007, 11:11 PM

It is indeed a G. platysoma. The orange spot is key.

Roy

gemini aquarius(t) · 08/19/2007, 08:16 PM

ya somoney im pretty sure the 20L is for liters not gallons and tank dimensions

BALISTIK · 09/28/2007, 12:55 PM

thanks for the research and contributions Dr. Roy!

dismalorb · 10/01/2007, 02:03 PM

Hey Dr. Roy!

Do you plan on adding more species to the list of Stomatopods? I understand you've added ones that are most suited for the hobby, but for us nuts out there that want to see more...

Is there a book in the works regarding Stomatopods?

soloweart · 02/26/2008, 10:14 PM

hi i bought a platysoma a week ago. as of yet he hasn't touched the live crabs and snails i put in for him. he has taken a few pieces of freeze dried krill from me but didn't finish it.he also hasn't used his mallets once. is this variety just really peaceful? i also own a peacock and its like night and day. is he ok?

BlakDuc · 04/03/2008, 10:49 AM

Thanks for the list Roy, nice job.

foofalak · 04/17/2008, 12:20 PM

I've just found what I believe to be a mantis in my tank. Its a hitch-hiker and the rock is "indo". I've tried to ID it from Roy's list, and it is a similar green to G.Viridis, however it has a orange spot on its 'back'. Anyone know what it might be? I'm not fast enough to get a picture of the little guy.

Gonodactylus · 04/17/2008, 12:45 PM

Is the spot between the eyes or where on the back?

Roy

foofalak · 04/17/2008, 12:57 PM

The spot is behind the eyes, but before the tail starts. Its more oval than circle, and the orange is kind of 'milky'. I would also say its closer to the eyes than the tail.

Gonodactylus · 04/17/2008, 02:00 PM

Watch and see if the orange spot is still there next time you see the animal. What you describe sounds much like the appearance of the stomach through the carapace after a big meal.

Roy

foofalak · 04/17/2008, 02:08 PM

ok, will do. Thanks

Scuba Dan · 06/14/2008, 05:12 PM

Need a little help from the experts. Picked up this little guy today at the LFS. The guy at the shop has no idea what type of Mantis shrimp this is. He is a dark maroon color (whole body). He is about 2.5" long. I looked through the list of mantis shrimps, but did not find any that was as dark as the one I have. If possible, I would like to narrow the list down as much as I can to give him the proper care he needs. He are a couple pics. Not the best, but hope it helps to identify him/her.
Thanks....

Gonodactylus · 06/15/2008, 08:34 AM

Looks like N. wennerae to me.

Roy

Scuba Dan · 06/15/2008, 11:32 AM

Thanks for the reply.

05/05/2007, 10:43 AM	#52
michelle .t Registered Member Join Date: May 2007 Location: mich. Posts: 10	roy i,v looked at your list. the mantis i,ve seen in my tank dosn't have the same color as any of these it is dark blue w/electric blue stripes on front legs sort of like the blue hermits its eaten.its a smasher tho seen it hitting rock and chipping out a larger hole it is about 1 in. long can u tell me what it is... __________________ Don't worry about the people in your past; There's a reason they didn't make it to your future michelle t. Current Tank Info: 55 gal. 2 osc clown 1pj cardnal and 6 line wrass and my first coral a ric..

05/06/2007, 12:59 PM	#54
michelle .t Registered Member Join Date: May 2007 Location: mich. Posts: 10	thanks a bunch not sure if i want to keep it or not hmmm...but must catch it first lol got an empty tank but not sure if i want to make another saltwater tank so soon before i'm usedto taking care of the first one __________________ Don't worry about the people in your past; There's a reason they didn't make it to your future michelle t. Current Tank Info: 55 gal. 2 osc clown 1pj cardnal and 6 line wrass and my first coral a ric..

08/19/2007, 08:16 PM	#63
gemini aquarius(t) Always Learning Join Date: Jul 2004 Location: Hollywood, FL Posts: 5,099	ya somoney im pretty sure the 20L is for liters not gallons and tank dimensions __________________ -Xavier Blue Thumb Aquatix @BTAquatix

09/28/2007, 12:55 PM	#64
BALISTIK Registered Member Join Date: Sep 2007 Location: So Cal Posts: 54	thanks for the research and contributions Dr. Roy! __________________ http://www.youtube.com/watch?v=O1eCjMF14Jo my peacock mantis shrimp in action!!

10/01/2007, 02:03 PM	#65
dismalorb Registered Member Join Date: Jan 2007 Location: Sac City, IA Posts: 154	Hey Dr. Roy! Do you plan on adding more species to the list of Stomatopods? I understand you've added ones that are most suited for the hobby, but for us nuts out there that want to see more... Is there a book in the works regarding Stomatopods? __________________ Kraft durch Freude! -Paul Current Tank Info: 125g Freshwater planted tank, 40g Peacock Mantis Shrimp tank and 450g Envision Acrylics 96x36x30 reef

03/07/2007, 09:13 AM	#51
Gonodactylus Premium Member Join Date: Aug 2001 Location: Berkeley, CA, USA Posts: 5,024	Most of the studies that we have on squillids are for species that are in warmer waters. How seasonally cold waters such as those on the northeastern seaboard affect growth and age are unknown, but I'm sure it must slow things down considerably. Most stomatopod females can either molt or reproduce - they can't do both at the same time. Once egg production starts, that will also slow growth. Squilla empusa in the northeast is a seasonal breeder and I think only produces one or two clutchs a year (I could be wrong). What we don't know is if they molt frequently when they are not reproducing. Sorry to rattle on about this, but the bottom line is we don't have the data to make an informed guess. Roy

05/05/2007, 02:21 PM	#53
Pea-brain Moved On Join Date: Dec 2006 Location: Vassalboro, ME Posts: 1,661	I've noticed you have TBS live rock. It is likely an N. wennerae. Look at the list. I believe there is a blue one on it.....Great species, ges about 3 inches, pretty active, though it varies between individuals.

05/06/2007, 06:10 PM	#55
Pea-brain Moved On Join Date: Dec 2006 Location: Vassalboro, ME Posts: 1,661	N. wenneraeare super hard. Just get a 10 galon, a glass cover an use some cured live rock and some sand from an established tank. pick up a can of freeze dried krill, a pack of frozen shrimp, and feed every other day or so. Feed live hard foods (snails, hermits) maybe once a month, and soak in selcon once a week. Do a 10% water change every week. easy.

05/07/2007, 12:51 AM	#56
justinl Registered Member Join Date: Jan 2007 Posts: 2,118	lol peabrain, that was a rushed post! lol michelle, he meant the wennies are super HARDY and they certainly are. he also meant for you to soak the frozens in selcon. the live food you just throw in the tank and let the mantis hunt. I love watching my G. smithii destroy crabs. make sure the live isn't big enough to harm the mantis though... ive seen a one eyed mantis before because of this. btw, i don't like freeze dried stuff. i like to stick to frozens. just a personal preference. btw michelle, with a bit more experience you could even start a reef tank... but where? why in the mantis tank of course silly! mantis among corals make amazing pics and it really is an amazing thing... fish don't even compare. just keep it in mind for later.

07/18/2007, 04:32 PM	#57
SoMoney Registered Member Join Date: Mar 2006 Posts: 41	Nice list, I have a general question regarding the common field, "Aquarium size (adult): ##L". How do we know Neogonodactylus wennerae need at least 20L for instance? From pictures, Video, and general observations, I hardly ever see these Mantis shrimp leave there caves. When they do leave there lair, it's rarely for more than 30 seconds and then they zip right back into there tiny burrow. I don't mean to sound mean or anything like that but whats the 20L for?

07/18/2007, 05:01 PM	#58
Gonodactylus Premium Member Join Date: Aug 2001 Location: Berkeley, CA, USA Posts: 5,024	My recommendation for aquarium size is just that - a recommendation based on my experience keeping these animals, what I know about their behavior in the field, physiological tolerances and other factors such as their tendency to bury food and molt skins. If you want, you can keep an adult N. wennerae in half a liter of water changed every four days (I have about 50 being held in the lab just that way.) However, if you want an animal that grows at a normal rate, reproduces and behaves as they do in the field, then a stable, larger tank is required. N. wennerae/bredini has been my primary research animal since I first worked on it in Bermuda 40 years ago. I have collected probably close to 100,000 of them, spent thousands of hours watching their behavior and have hundreds of hours of video taken in the field. While when maintained in a small aquarium and provided food at or near the cavity, they may remain secretive. In the field where food (and mates) are more scarce and must be searched for, adult N. wennerae make several ftrips away from the cavity starting just after dawn, slowing at mid-day and picking up towards sunset. Cavities are always closed by dusk and opened at dawn. Actually, behavior in an aquarium doesn't really look much like field activity until the animals are housed in a really large tank, but a 10 gal is a nice compromise that promotes good water quality and gives the animal room to move about. Can they be kept in a smaller system? Sure. Will they behave as they would in the field? Probably not. Will they they grow and reproduce as much as in the field and live as long? No. Are they as happy? I have no idea.

07/18/2007, 05:28 PM	#59
SoMoney Registered Member Join Date: Mar 2006 Posts: 41	Thanks! I find mantis so enjoyable to watch. I'm just trying to get into a N.wennerae or the larger O.scyllarus's head to figure out what they want and if there needs differ much with regards to tank size (Understood, some use rocks, some dig tunnels, etc). It sounds like there kind of like us, Sleep, Feed & Breed. =)

07/30/2007, 01:50 PM	#60
AAASINGER Registered Member Join Date: Jul 2007 Location: NW Florida Posts: 7	Great!!! job!!! Thanks

08/07/2007, 10:39 PM	#61
mrotakki Registered Member Join Date: Aug 2007 Posts: 1	I used to keep a fairly small mantis in an old 20 gallon tank, but had to move a few years back. I ended up giving it away - but recently started back up and picked up a larger mantis from the local store. So far it's taken a liking to the cave that it has adopted, and goes so far as to peer out and guard it unless someone walks by (at which point it ducks back in and peers out cautiously). The store had no firm ID and I've IDed it rather haphazardly as a G. platysoma and was hoping I could get a more firm ID of the specimen. I've got a couple of photos here and here . I'll attempt some more photos relatively soon if these are insufficient for identification. Any help would be fantastic! Currently I put in a "fresh" round of hermit crabs, astrea snails and a couple mithrax crabs once I notice most are "missing" or the telltale pile of debris and discarded shells outside the burrow gets fairly large. I've also been feeding the mantis freeze-dried krill every now and again by wedging pieces around the tank. They disappear after fifteen or so minutes, so I can only assume the mantis is taking them. If there's anything else you'd recommend, I'd love to hear it. Thanks!

08/07/2007, 11:11 PM	#62
Gonodactylus Premium Member Join Date: Aug 2001 Location: Berkeley, CA, USA Posts: 5,024	It is indeed a G. platysoma. The orange spot is key. Roy

02/26/2008, 10:14 PM	#66
soloweart Registered Member Join Date: Jan 2008 Location: Lowell,ma Posts: 7	platysoma hi i bought a platysoma a week ago. as of yet he hasn't touched the live crabs and snails i put in for him. he has taken a few pieces of freeze dried krill from me but didn't finish it.he also hasn't used his mallets once. is this variety just really peaceful? i also own a peacock and its like night and day. is he ok?

04/03/2008, 10:49 AM	#67
BlakDuc Fragger Join Date: Nov 2006 Location: Waldorf, MD Posts: 4,518	Thanks for the list Roy, nice job. __________________ Joe Cude Current Tank Info: IM Fusion 40

04/17/2008, 12:20 PM	#68
foofalak Registered Member Join Date: Nov 2007 Posts: 3	I've just found what I believe to be a mantis in my tank. Its a hitch-hiker and the rock is "indo". I've tried to ID it from Roy's list, and it is a similar green to G.Viridis, however it has a orange spot on its 'back'. Anyone know what it might be? I'm not fast enough to get a picture of the little guy.

04/17/2008, 12:45 PM	#69
Gonodactylus Premium Member Join Date: Aug 2001 Location: Berkeley, CA, USA Posts: 5,024	Is the spot between the eyes or where on the back? Roy

04/17/2008, 12:57 PM	#70
foofalak Registered Member Join Date: Nov 2007 Posts: 3	The spot is behind the eyes, but before the tail starts. Its more oval than circle, and the orange is kind of 'milky'. I would also say its closer to the eyes than the tail.

04/17/2008, 02:00 PM	#71
Gonodactylus Premium Member Join Date: Aug 2001 Location: Berkeley, CA, USA Posts: 5,024	Watch and see if the orange spot is still there next time you see the animal. What you describe sounds much like the appearance of the stomach through the carapace after a big meal. Roy

04/17/2008, 02:08 PM	#72
foofalak Registered Member Join Date: Nov 2007 Posts: 3	ok, will do. Thanks

06/14/2008, 05:12 PM	#73
Scuba Dan Registered Member Join Date: May 2003 Location: Thonotosassa, FL Posts: 711	Please help identify mantis shrimp. Need a little help from the experts. Picked up this little guy today at the LFS. The guy at the shop has no idea what type of Mantis shrimp this is. He is a dark maroon color (whole body). He is about 2.5" long. I looked through the list of mantis shrimps, but did not find any that was as dark as the one I have. If possible, I would like to narrow the list down as much as I can to give him the proper care he needs. He are a couple pics. Not the best, but hope it helps to identify him/her. Thanks....

06/15/2008, 08:34 AM	#74
Gonodactylus Premium Member Join Date: Aug 2001 Location: Berkeley, CA, USA Posts: 5,024	Looks like N. wennerae to me. Roy

06/15/2008, 11:32 AM	#75
Scuba Dan Registered Member Join Date: May 2003 Location: Thonotosassa, FL Posts: 711	Thanks for the reply.