Common Name: Moon jelly
Latin Name: Aurelia aurita
Size/weight: Up to 16 inches in diameter
Range: Arctic to Florida or Mexican; in the Pacific from Alaska to southern California
Habitat: Floats near surface in offshore waters.
Diet: Small plankton, fish eggs, occasionally other developing jellies.
Predators: Sea turtles, sunfish.
Description: Translucent; recognizable for the four horseshoe-shaped organs in their center and a single row of short, hair-like tentacles around the bell. Since they’re not really fish, it is more proper now to call them “jellies,” instead of jellyfish. Moon jellies are only mildly toxic to most people; the sting is likely to cause nothing more than a persistent, itchy rash. But some folks may have more severe reactions.
Common Name: Eastern oyster (sometimes called American or Virginia oyster)
Latin Name: Crassostrea virginica
Description: A prolific bivalve mollusk with thick irregular grayish-white shells with concentric ridges. The left (or bottom) shell is cupped with a purple muscle scar inside. The right (or top) shell is smaller and flatter.
Size/weight: Shells generally are 3 to 5 inches long
Range: Eastern North America, from the Gulf of St. Lawrence to the Gulf of Mexico
Habitat: Estuarine or salty water, in intertidal and subtidal zones. They can grow in great beds or reefs, with new immature animals "setting" on old empty shells. Oyster reefs provide bottom habitat for other marine invertebrates and fish species.
Diet: Oysters are filter-feeders. They open their shell & pump in water, which draws planktonic food in as well. (Oysters filter so much water that a large population of oysters can effectively help keep a body of water clean.)
North American river otter
Common Name: North American river otter
Latin Name: Lontra canadensis
Size/weight: Adult size is about 2.5 – 5 feet long (with tail) and 10 – 30 pounds.
Range: Throughout North America (Alaska, Canada and the lower 48 United States).
Habitat: River otters can be found in or near fresh water (lakes, streams, marshes, etc…) and in brackish waters. They build their dens (or take over abandoned dens of other animals) in riverbanks or in a natural hollow near the water.
Diet: North American river otters find most of their food in the water; amphibians, fish, turtles, crayfish, crabs and other invertebrates are favorites. Birds, eggs, aquatic plants, and small land mammals are sometimes on a river otter’s menu.
Predators: Bobcats, coyotes, birds of prey, dogs. Hunting.
Atlantic salmon (East Coast)
Common Name: Atlantic salmon (East Coast)
Latin Name: Salmo salar
Size/weight: Up to 4.5 feet and 80 pounds
Range: Arctic Circle to Delaware River, also some landlocked populations.
Habitat: Coastal waters, as well as freshwater rivers and lakes.
Diet: Herring, capelin, sand eels and large plankton.
Predators: Seals, sharks, pollack, tuna, skates, halibut, cod, striped bass, bluefish; humans.
Description: Long body, brownish above with silvery sides featuring black spots. Lower jaw hooked up in breeding males, who may also feature red areas on their sides. Spawns in fresh water, but spends most of its life at sea.
Common Name: Lined seahorse
Latin Name: Hippocampus erectus
Size/weight: Up to 5 inches
Range: Nova Scotia to Argentina; Bermuda and Gulf of Mexico
Habitat: Found in shallow waters among grasses
Diet: Brine shrimp and other live zooplankton.
Predators: Crabs, skates and rays; humans.
Description: Body is upright with a head (shaped liked a horse head) perpendicular to body. Dorsal fin is fan shaped. Tail is prehensile and lacks a caudal fin. Color varies from light brown to almost black and can change depending on the background. It is the male of the species that gives birth.