an important food source for many animals DORSAL -the upper surface of an animal or the surface where the spinal chord is located ENDANGERED -designating plants and animals that are on the brink of extinction EXOSKELETON -the outside skeleton or shell found on arthropods such as shrimp, crabs and lobsters EXTINCTION - the total disappearance of a species of animal or plant FILTER FEEDERS - animals, which eat by filtering small food particles from the water FLIPPERS -modified legs of sea turtles used for swimming FOOD CHAIN - 
(the spinal chord; is located; L:the surface) (the water FLIPPERS -modified legs of sea turtles; used; for swimming FOOD CHAIN) (ENDANGERED -designating plants and animals; are; on the brink of extinction EXOSKELETON) (the outside skeleton or shell; found; L:on arthropods such as shrimp, crabs and lobsters) (animal or plant FILTER FEEDERS - animals; eat; )
the spinal chord the water FLIPPERS -modified legs of sea turtles ENDANGERED -designating plants and animals the outside skeleton or shell animal or plant FILTER FEEDERS - animals
is located used are found eat
L:the surface
for swimming FOOD CHAIN
on the brink of extinction EXOSKELETON
L:on arthropods such as shrimp, crabs and lobsters