urchin- as in a sea urchin. I think you meant the letter 'U' and not the word 'you.'
Algae
islandsicebergs
Nurse shark is an ocean critter. It begins with the letter N.
Atlantic and Arctic
Oceans of the world include the Arctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean and the Southern Ocean. They do not begin with the letter C.
mullusk
fish
· Tuna
islands
Killer whale is an ocean animal. It begins with the letter K.
ocean liner
electric eels