shell - sea - hard
A shell protects some sea animals, which is very hard.
king crab - strong - food
The king crab has strong claws which help it find food.
climate - species - ocean
The climate, which is changing quickly, affects many species in the ocean.
sea cow - swim - flipper
The sea cow has a flipper which helps it swim slowly.
whale - mammal - ocean
A whale is the biggest mammal in the ocean.
seahorse - tiny - species
A seahorse is a tiny species of fish which looks very unusual.
penguin - fly - high
A penguin can't fly very high.
dugong - mammal - grass
A dugong is a large marine mammal which eats sea grass.
narwhal - tusk - horn
The narwhal has a long tusk which looks like a horn.