Organisms at the beach found under rocks

well , there a lot of organisms living in water . mostly algae produce on rocks , called rotting logs . these are also bioindictors ( to determine how is air pollution by the mitigated activity of algae .

moreover there a lot of invertebrates : hydra that like at the shore of the seas usually .

You can see a lot of organisms in the rocky areas of the beach. That would comprise mostly of invertebrates. These invertebrates would include Molluscs such as Cypraea and other shells; Echinoderms including brittle stars, the common starfish, sea cucumbers, and Synapta; Arthropods such as hairy crabs, mantis shrimp, and hermit crabs and many other representative species of other Invertebrate phyla. It is advisable for you to go out on a beach and observe for yourself.

Yeah I read that as orgasms...