| A | B |
|---|
| cockroach | an insect of the order Orthoptera with a flat, oval body and long antennae and is considered a household pest |
| Coleoptera | a large order of insects commonly known as beetles |
| compound eye | an insect eye composed of many small, light-sensitive facets |
| conch | a large,one-shelled (univalve) mollusk with a bumpy shell |
| coral polyp | a tiny invertebrate with a hard exoskeleton, billions of which form a coral reef |
| coral reef | a ridge of coral skeletons lying close to the surface of the ocean |
| cowrie | a one-shelled (univalve) mollusk having a smooth, glossy shell that is often speckled |
| crab | any of a large group of crustaceans that have pincers and eight legs and walk sideways |
| crayfish | a freshwater crustacean that looks like a miniature lobster |
| cricket | an insect of the order Orthoptera that has long antennae and makes a chirping noise by rubbing its hind legs together |
| crustacean | an arthropod with a hard, crusty shell |
| crustacean | includes barnacle, crab, lobster, shrimp, and wood louse |
| cuttlefish | a squidlike ocean mollusk with ten short arms |
| damselfly | a slow-flying beneficial insect of the order Odonato that has two pairs of equal-sized, transparent wings |
| Danaidae | the name given to the family of butterflies that eat milkweed while in the caterpillar stage |
| Danaus | the genus name for the monarch butterfly and the queen butterfly |
| deer tick | a tiny arachnid that spreads Lyme disease |
| diatom | a microscopic one-celled plankton having a glassy skeleton |
| dinoflagellate | a single-celled alga that resembles both an animal and a plant |
| Diptera | the order of insects having only two wings |
| Diptera | this order includes flies, gnats, and mosquitoes |
| dragonfly | a large, rapid-flying, beneficial insect of the order Odonata that has two pairs of equal-sized, transparent wings |
| entomologist | a scientist who studies insects |
| exoskeleton | the sturdy, outer protective covering of arthropods |
| family | biological group of plants or animals that is smaller than an order but larger than a genus |
| feather star | a frilly marine invertebrate that is a relative of the sea urchin and sea star |
| flagellum | a small, whiplike structure found on protozoans and bacteria |
| fly | a general name for a large group of flying insects with one pair of membranous wings, belonging to the order Diptera |
| food vacuole | a tiny container within protozoans used for the digestion, absorption, and storage of food |
| gastropod | a mollusk that has either one shell, such as a snail, or no shell, such as a slug |
| genus | a category of plants or animals larger than a species and smaller than a family |
| gill | a structure in water creatures that is used for breathing by taking oxygen from the water |
| gland | an organ that produces certain substances, such as a spider's silk |
| gnat | any of various tiny insects belonging to the order Diptera |
| grub | a fat, short, wormlike larva of an insect, usually a beetle |
| harvestman | a beneficial arthropod belonging to the arachnid class, commonly called daddy-longlegs |
| Hemiptera | an order of insects having piercing-sucking mouthparts and forewings that cross to form an X or a V at the base of the abdomen |
| Hemiptera | this order of insects also known as "true bugs" |
| Hemiptera | this order of insects includes bedbugs, squash bugs, stinkbugs, and water striders |
| herbivore | an animal that eats only plants |
