bipinnaria
glochidium
auralia
echinus
A. bipinnaria
digestive system
water vascular system
canal system
none of these
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Ophiothrix
Pentaceros
Antedon
None of these
coelenterates
marine arthropods
echinodermates
sponges
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sand dollar
Jelly fish
Silver fish
All of these
herbivorous
omnivorous
carnivorous
none of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Star fish
Sea fan
Ship worm
None of these
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
tube feet
lobopodia
cephalopodia
rhizopodia
Sea-star
Star fish
Sea-cucumber
Sea lily
torneria
onchosphere
trochophore
bipinnaria
bipinnaria
glochidium
auralia
echinus
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
pluteus
echinopluteus
bipinnaria
auricularia
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Sea star
sea urchin
Sea cucumber
Feather star
spines
tube feet
integumentary structures
none of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
Sea hares
Brittle stars
Star fishes
Sea fish
locomotion
respiration
feeding
all of these
sea-hares
sea-stars
devil fish
sea fans
echinodea
holothuroidea
asteroidea
ophiuroidea
Asterias
Antedon
Echinus
Ophiothrix
Sea stars
Cake urchins
Sea lilies
Sea cucumbers