Marine Invertebrates Vocabulary

Flashcards covering the Unit 7 Review Guide on Marine Invertebrates.

Porifera

Also known as sponges, reproduce asexually or sexually (hermaphrodites), are filter feeders, and exhibit asymmetrical symmetry.

Cnidaria

Includes jellyfish, corals, and anemones; reproduction through spawning; mode of feeding involves tentacles surrounding a central mouth; exhibits radial symmetry.

Platyhelminthes

Flatworms; hermaphroditic (some self-fertilizing); feed on small invertebrates; exhibit bilateral symmetry.

Annelida

Segmented worms; reproduces sexually; filter feeding; exhibit bilateral symmetry.

Class Bivalvia

Includes clams, oysters, scallops, mussels. Characterized by 2 shells, spawning, filter feeding and bilateral symmetry.

Class Gastropoda

Includes conchs, snails, and slugs. Characterized by 1 shell or no shell, can reproduce sexually or asexually grazers, and exhibits bilateral symmetry.

Class Cephalopoda

Includes squid, octopus, cuttlefish, and nautilus. Reproduces sexually, are carnivores and exhibit bilateral symmetry.

Class Crustacea

Includes crabs, lobsters, and shrimp. Reproduces sexually, mode of feeding varies, and exhibits bilateral symmetry.

Class Asteroidea

Sea Stars, mode of feeding is through use of a cardiac stomach to digest prey, exhibits radial symmetry.

Class Ophiuroidea

Brittle Stars: Reproduces sexually, and uses tube feet to gather food particles exhibiting radial symmetry.

Class Echinoidea

Sea Urchins, sand dollars; reproduction is through spawning- Aristotles lantern to bite algae; exhibits radial symmetry.

Class Holothuroidea

Sea cucumbers; deposit feeders; radial symmetry.

Class Crinoidea

Feather stars, sea lilies; filter feeders; radial symmetry.

Subphylum Urochordata

Tunicates or sea squirts: filter feeders; bilateral or asymmetrical.

Subphylum Cephalochordata

Lancelets, filter feeders, bilateral symmetry.