mercredi 28 janvier 2015

Vermetid Snail

Do you agree with the following, especially the section " Their presence is a sign of a healthy system" -



This group of snails have forgone their mobility by attaching their "shell" to the substrate and converting it into a calcerous tube. They release a mucus web out into the water, which they then reel back in and consume, eating the food particles caught in it. Their presence is a sign of a healthy system and don't typically cause any problems. The exception is if the mucus net irritates a neighbouring coral, which can lead to death of the polyps that it is irritating.



from http://ift.tt/1uBsWLR




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