Bad snails for reef aquariums

[05grandprix]

I thought it would be helpful to start a list of those snails here, to help prevent people from making mistakes. Others simply have snails that shouldn't be in a reef tank because they are colder water or temperate species, or because they get too large.

Flamingo Tongue- A beautiful snail that feeds solely on gorgonians.

Bumble Bee Snail - Sold as a sand stirrer, it eats the micro fauna in your sand that makes it "live".

Murex Snails - All of the snails in this family are predatory, and will feed on herbivorous snails, leaving your tank with algae.

Illynesa Obsoleta- a big seller on Ebay, as their colonies blanket the coasts of temperate shores. They are a colder water snail that scavenges and eats other snails and bivalves. They are also cannibalistic and are known carriers of parasites that can infect both fish and humans. If you have them, do not release them locally.
Margarita Snails - this very popular snail's range does not extend into the tropics, and they will be stressed in normal reef tanks, because they are not built to tolerate reef temperatures. A good snail though if your tank rarely goes to 70 degrees, otherwise you will be slowly torturing them to death. They are excellent algae cleaners in a temperate tank, and a favorite among many hobbyists with cold water biotopes.
Crown Conchs - A predatory snail that will eat other herbivorous snails, leaving your tank with algae. They are also cannibalistic.
Queen Conchs- these herbivorous snails are great at first, but when they become close to 12 inches long, 4 inches tall, and 5 inches wide, they are just too big for most tanks, as they need a large amount of area to survive. At that size they also bulldoze most rock formations.
Keyhole Limpets- Not all limpets are the same. Owning a limpet is like owning a snail, the species really matters. Many of the keyhole limpets are known predators, some of which feast on SPS coral.If you keep coral, only keep species limpets who are herbivorous.
Olive Snails- These snails have been popping up in the hobby, and it is a shame. They are predatory, and feed on small bivalves, microfauna and other snails.They also scavenge, but they are opportunistic.