index finger pointing towards a crustacean coming out of a sea shell at a beach - caenogastropoda

aquatic arthropod beach biological biology bioscience caenogastropoda close coastal collection collector coming common conch conchology cone crustacean direct directing exoskeleton field finger from gastropod gastropoda guide index insect invertebrate land life macro malacology marine mollusc mollusca molluscan mollusk moving ocean oceanography oceanology out periwinkle point pointing prosobranchia saline sand sandy science sea seashell seashore shell shelled shore siphon slug snail streptoneura towards turrid univalve water winkle