Transcript Sea Slug
Molluscs • MOLLUSKS • - have soft body with a hard shell (usually) • - have thick muscular foot to help them move or bury in sand • - has a head region with mouth and eyes • - has a mantle that produces the shell Mollusks • Three Types of Mollusks • 1. Gastropods - (snails and slugs) • - has 1 shell or no shell • - has radula, a tongue like rasp that files off plant matter to eat Radula Radula Limpets Limpets Limpets Shield Limpet Limpet Underside Abalone Abalone Abalones Gastropod Black Turban Snail Gastropod Whelks Gastropod Wavy Top Snail Wavy Top Snail Gastropod Univalve Cone Snails Cone Snails Cone Snails Cone Snail Cone Snail Fishing Cone Snail Gastropod Sea Slugs Nudibranch Sea Slug Sea Slug Sea Slug Sea Slug Sea Slug Sea Slug Sea Slug Sea Slug Sea Slug • 2. Bivalve - (clams, mussels, oysters) • - has 2 shells • - move by clapping shells together to propel through water. • - no radula, they are filter feeders Bivalves Mussels Mussels Scallop Scallop Scallop Cockles Geoduck Oysters Oyster Bed Siphon • 3. Cephalopods - (octopus, squid, and nautilus) • - all have tentacles to move and capture food • - octopus has 8 tentacles, squid 10, nautilus has 38 to 90 Cephalopod Cephalopod Blue Ringed Octopus Octopus Cephalopod Giant Squid Giant Squid Giant Squid Squid Squid Squid Vampire Squid Nautilus Cephalopod Cuttlefish Amphineura Chiton Chiton Underside Scaphopoda Tusk Shell Scaphopod Tusk Shells