2 Answers

I had a summer course in college called "Biology of the Seashore"  it was a fun class, we explored tide pools.  We collected specimens  every other day.  Mon. would be identified on Tues.; Wed. collections on Thur., and test on Friday.  we kept specimens in salt water aquariums, and threw stuff out.  Sometimes "Pipefish" would jump out of the tank and be found the next morning dead and dried up on the floor.  There were many molluscs and fish, other arthropods and crustaceans.  We didn't dwell on the plant life.   Our final exam was to collect only edible animals, and we had a great feast! 

I like tide pools too. Tide pools are areas on rocks by the ocean that are filled with seawater. Tide pools can be small, shallow puddles found high up on the shore or huge, deep holes nearer to the sea.
Tide pools form when the ocean covers the beach twice a day. Some of the plants and animals that live close to the sea are covered when the tide washes over them. They have to be able to survive in both wet and dry conditions. The tides bring fresh oxygen and food to them. Between tides, some of the smaller pools become too warm and begin to dry up. Many of the animals hide under cool, damp rocks and moist seaweeds so that their bodies do not dry out before the tide comes in again.  (copied from resource option when searched: tidepool life 

Tide pools are found in many parts of the world.  There will be variations in who's there, depending on where you are.  Check for yourself.  "Google" "tide pool inhabitants" and see what's different between Maine and Mexico!