I am not sure about that either. But I know something interesting: Beaches occur in areas where the sediments are deposited and reworked by current or wave action
yea well they typically occur in areas along the coast where wave or current action deposits and reworks sediments that can contain crawfish and crabs
I just love the beach do you know anything about it's coral reefs? Unfortunatelly I don't know anything about coral reefs, all I know is that beaches are composed by particles made from rock, like gravel, sand, pebbles and others Where do those materials come from?  Are they washed up from the ocean? I am not sure about where they are from but I know that they can have a biological origin also, like mollusc shells Do any animals live on the beach?
Beaches typically occur in areas along the coast where wave or current action deposits and reworks sediments.