How do fish know?

fishgate · 04/07/2015, 07:51 AM

I put a net in the tank all the time to right snails that have flipped over. The fish don't seem to care and sometimes I have to move the net as they swim right into it. But I put the net in to get a fish out and they all run and hide. How do they know?

Kyle461 · 04/07/2015, 07:54 AM

It's the look of determination in your eyes.

Sk8r · 04/07/2015, 10:33 AM

THere is no flipped snail in evidence?

fishgate · 04/07/2015, 11:22 AM

Quote:

Originally Posted by Sk8r

THere is no flipped snail in evidence?

You might be on to something there. Maybe they see the snail in distress and think the net is a predator that is going to leave them some crumbs. Their desire for crumbs overwhelms their desire to be safe.

gone fishin · 04/07/2015, 12:33 PM

It is the fish version of " here hold my beer".

hkgar · 04/07/2015, 02:50 PM

When it is relatively stationary (not moving) they come to inspect. When it starts moving towards them it is presumed a probable threat. This gets reaffirmed as as soon as they move the net changes direction and starts coming again.

Rensmif · 04/07/2015, 03:44 PM

Quote:

Originally Posted by fishgate

I put a net in the tank all the time to right snails that have flipped over.

Wont most flipped snails right themselves eventually ?
should'nt be much of an issue unless you have an opportunistic predator in your tank, if that is the case he will get them anyway sooner or later

Heatherabel3 · 04/07/2015, 03:53 PM

My shrimp does that. If I put my hand in the tank he comes right to me and practically jumps in my hand. Even wave the net in front of the tank and he goes into hiding.
That is one of my favorite things about having a tank, the personality that all of these animals have it just amazing to watch.

fishgate · 04/07/2015, 05:04 PM

Quote:

Originally Posted by Rensmif

Wont most flipped snails right themselves eventually ?
should'nt be much of an issue unless you have an opportunistic predator in your tank, if that is the case he will get them anyway sooner or later

I've had them remain on their back overnight before. Now when I see them I just help them. No predators.

jaybfresh · 04/07/2015, 05:06 PM

Quote:

Originally Posted by Rensmif

Wont most flipped snails right themselves eventually ?
should'nt be much of an issue unless you have an opportunistic predator in your tank, if that is the case he will get them anyway sooner or later

Astrea's can get stuck

04/07/2015, 07:51 AM	#1
fishgate Registered Member Join Date: Oct 2011 Location: Damascus, MD Posts: 3,340	How do fish know? I put a net in the tank all the time to right snails that have flipped over. The fish don't seem to care and sometimes I have to move the net as they swim right into it. But I put the net in to get a fish out and they all run and hide. How do they know? __________________ 125RR in-wall, 40B Sump, CS180 BM Skimmer, ATI 4x80 watt, eheim 1262, custom wrap around rock wall, ReefKeeper Elite 120g in-wall, 40B Sump, PC 54wx4, Jabao DC-6000 (full siphon), future seahorse t Current Tank Info: 125g, 120g, 2x40b sumps, ATI 4x80 T5HO

04/07/2015, 07:54 AM	#2
Kyle461 Registered Member Join Date: Mar 2014 Location: Corpus Christi, TX Posts: 438	It's the look of determination in your eyes. __________________ Nadie me paga en chicles!! Build Thread: http://www.reefcentral.com/forums/showthread.php?t=2485917 Current Tank Info: 40 gallon breeder (2/17/15); 20L 3-chamber sump; Tunze Nano ATO; Hydor 320gph return and Circulation 850 gph; Coralife Super Skimmer 125 G; Marineland 24"-36" Reef LED

04/07/2015, 10:33 AM	#3
Sk8r RC Mod Join Date: Feb 2006 Location: Spokane WA Posts: 34,628 Blog Entries: 55	THere is no flipped snail in evidence? __________________ Sk8r Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low. Current Tank Info: 105g AquaVim wedge, yellow tang, sailfin blenny,royal gramma, ocellaris clown pair, yellow watchman, 100 microceriths, 25 tiny hermits, a 4" conch, 1" nassarius, recovering from 2 year hiatus with daily water change of 10%.

04/07/2015, 12:33 PM	#5
gone fishin Registered Member Join Date: Jul 2011 Location: Wyocena Wi Posts: 6,936	It is the fish version of " here hold my beer". __________________ Tony Current Tank Info: 180gal DT, BM NAC77 skimmer,3 Maxspect razors, Maxspect Gyre 150, 30g QT

04/07/2015, 02:50 PM	#6
hkgar Registered Member Join Date: Oct 2002 Location: Dewitt MI Posts: 5,051	When it is relatively stationary (not moving) they come to inspect. When it starts moving towards them it is presumed a probable threat. This gets reaffirmed as as soon as they move the net changes direction and starts coming again. __________________ Gary 180 gallon, 40 gallon sump, 3 250 W MH + 4 80W ATI T5's, MTC MVX 36 Skimmer, Apex controller Aquamaxx T-3 CaRx Current Tank Info: A 2 Barred Rabbitfish, Red Head Salon, Yellow/Purple, McMaster Fairy, Possum, 2 Leopard Wrasses, Kole, & Atlantic Blue Tangs, 2 Percula Clown, 3 PJ and 1 Banggai Cardinalfish , Swallowtail, Bellus and Coral Beauty Angels

04/07/2015, 03:53 PM	#8
Heatherabel3 Registered Member Join Date: Apr 2015 Posts: 182	My shrimp does that. If I put my hand in the tank he comes right to me and practically jumps in my hand. Even wave the net in front of the tank and he goes into hiding. That is one of my favorite things about having a tank, the personality that all of these animals have it just amazing to watch.