I never tire of watching my intertidal snails going about their business. They're busy little critters, always on the move, up and down the walls, in and out of the water, over rocks and seaweeds and other animals. I've even seen them sliding along on the underside of the water surface itself.
These are among the tiniest in my aquarium:
|Littorina scutulata, Checkered periwinkle, eating.|
There are two species of tiny periwinkles found on our shores in the upper intertidal zone, the Sitka periwinkle, and this, the Checkered. They are very much alike at first glance; I may have some of each in the tank. But the Sitka periwinkle has a rounder shell, and its tentacles are black. And it spends a lot of its time out of the water and can even drown if it stays in too long. In my tank, they hang out just under the edge and when I drop them back in the water, they wake up and head for the air again.
|Periwinkle eating algae on the shell of a hermit crab.|
|Carinate dovesnail, Alia carinata|
|I've never seen one stretch out and coil his foot like this before.|
|Dovesnail and amphipod.|
And more critters, tomorrow.