This question from your assignment wants you to think -- and to do some research on rock pool animals. We don't know which other animals you've had on the assignment, so we can't name "more" of them. You'll have to use your search engine - just type in "rock pool animals" and hit enter.
A rock pool is formed by the tide, the tide is the sea. Rock pools are formed by the sea, filling them up when the tide is in. when the tide is out the rock pools keep most of there water but, most of the water evaporates into the air.
A seashore rock pool is a pool of sea water trapped in rock depressions on a seashore while the tide recedes or where water is splashed or sprayed by wave action or storms during high tides and collects in a rocky basin from which it cannot drain.