Marine Invertebrates Flashcards
sponges
the simplest multicellular organisms
the hollow chamber where water enters a sponge via small pores
Ostia
the large opening where the water exits in a sponge
osculum
animals that strain food out of the water
suspension or filter feeders
animals that ingest sediment and digest the organic matter
deposit feeders
a bubble that is produced by Snapping shrimp that collapses violently
cavitation bubble
generates a shock wave and dim light flash that can be used for offense or defense
Snapping shrimp’s cavitation bubble
oral and aboral
surface type of radially-symmetrical animals
phylum cnidaria
sea anemones and corals
some cnidarians have a
immobile polyp and mobile medusa stages
polyp/medusa
Both variations on the same general body plan
polyp
immobile, tube structure (sexual and asexual stage)
medusa
free swimming, umbrella structure (sexual stage)
box jellyfish
highly venomous cnidarians
Class Scyphozoa
the medusa is the dominant stage
radially symmetrical phylum, entirely marine, moves by cilia
Ctenophora
simplest bilaterally-symmetrical organism
flatworms
comb jellies use sticky cells to capture prey
colloblasts
flatworms are in?
Phylum Platyhelminthes
Phylum Platyhelminthes has 2 parasitic classes
Trematoda and cestoda
snail, conch, and whelk are
gastropods/mollusks
Mollusks have spiral-shaped shells and muscular feet. They are also called
Gastropods
What is the most intelligent class of mollusks
Cephalopods
What is the primary defense used by cuttlefish
Camouflage
Ribbon worms with a long proboscis that entangle prey are in what phylum?
Nemertea
Roundworms belong in what wormlike Phylum?
Nematoda
The most abundant group of marine annelids are?
Polychaete worms
What class in the mollusks consists of an animal enclosed in 2 shells
Bivalvia
What animal is in the Bivalvia class
clam
The mantle is the tissue that covers Bivalves, what does it secrete
calcium carbonate CaCO3
Scallops are
bivalves that have multiple eyes
Crustaceans
belong to the phylum Arthropoda
Crustacean growth is punctuated by periodic molting of the exoskeleton,
staircase growth pattern
Crustacean weight
linear, continuous
Example of an isopod
the terrestrial ‘roly poly’
Krill
crustaceans that support the Antarctic food web
large fisheries exist for crustaceans belonging to
order Decapoda
Decapoda
blue crabs, lobsters, shrimp
Horseshoe crabs
important blood has pharmaceutical applications, their eggs nourish migrating shorebirds
What belongs to an entire marine phylum and has tetrodotoxin on spines called chaets
Chaetognaths
bilaterally symmetrical animals
Adult echinoderms are classified…. because of their larvae
Echinoderm locomotion uses hydrostatic pressure controlled by
water vascular system
What includes 2 invertebrate subphyla and 1 vertebrate subphylum
Chordates
