Animals that swim in the ocean?

sea anemones

sea horses

dolphins

whales

sea otters

penguins

mackeral

anchovies

sea urchins

octopus

sea star

shrimp

crab

lobster

seal

sea lion

sea gulls

puffins

clams

mussels

barnacles

limpets

coral (not plants!!)

abalone

sharks

jellyfish

pufferfish

footballfish

angler fish