What is the difference between a whelk and a Nassarius snail? In the picture below, the creature on the left is a Nassarius snail, the one on the right is a whelk. Whelks get much larger, while Nassarius don't. At least Nassarius vibex, that is. And all the images at the top of this article are Whelks, an unwanted snail in a reef system. Read on...
I added a few new zoos from a local reefer's tank last night. Most of the zoanthids haven't opened up yet, for various reasons. Mostly because my hermit crabs are checking out the new guys and that causes the polyps to remain closed. Some very light pink ones have fallen off their perch twice, so I couldn't get a good picture of those either.
These are the prettiest ones of the ones I got, and they were open today.
New Zoanthids. They are the size of a pencil eraser or smaller.
