well they are but they don't have a shell
Crayfish have an external skeleton and starfish have an internal skeleton relying on a water vascular system for movement.
Starfish are echinoderms that belong to subphylum Asterozoa, and class Asteroidea. There are approximately 1,500 species of starfish, and can be found through out the ocean.
Carp Catfish Cirriped (crustacean) Clam Cleaner-wrasse Clingfish Clown anemone fish Cod Coelacanth (various fishes) Conch Cooter (freshwater turtle) Copepod (freshwater crustacean) Coral Corydoras (freshwater fish) Cottonmouth (water snake) Crab Crayfish Crocodile Crown-of-thorns starfish Crustacean Cuttlefish
No because a crustacean has a exoskeleton and a mussel has a shell
a crab is a crustacean
No. A bird is not a crustacean.
crustacean is not a decomposer
crustacean
No, a frog is an amphibian, not a crustacean.
Yes, because it does not have a backbone.A starfish is an invertebrate.Yes! :) Because it doesn't have backbone .yupyes!! star fish is an invertebrate!starfish is an invertebrate, precisely phylum echinodermata.Yes the starfish is an invertabrate. Whoever thought it wasn't an invertebrate because it was an echinoderm is a nimrod because an echinoderm is a classification of an invertevbrate. i am in 8th grade and my textbook says it is an invertebrate, and my teacher is awesome. Your welcome.
Most lobsters are nocturnal (most active at night). They are predators that eat crabs, clams, worms, snails, mussels, flounder, and other lobsters. from this site -http://www.enchantedlearning.com/subjects/invertebrates/crustacean/Lobsterprintout.shtml
Crustacean Records was created in 1994.