Coelacanth Group Questions

Coelacanths have a _______ caudal fin, which is where the dorsal and the anal rays join
around the posterior of the fish

Leptocercal

Which of the following is a unique structure found in coelacanths that allows them to
open their mouths wider?
a. Pretrusional Jaw
b. Lobed fins
c. Intracranial Joint
d. Operculum

c. Intracranial Joint

The swim bladder found within modern coelacanths functions as a gas-filled buoyancy
organ.
True
False

False

Which group of vertebrates are coelacanths most closely related to?
a. Jawless fishes

b. Lungfish and tetrapods

c. Sharks and rays

d. Ray-finned fishes

b. Lungfish and tetrapods

What marine habitat do Coelacanths favor?
a. Mangroves
b. Coral reefs
c. Seagrass beds
d. Open ocean

b. Coral reefs

According to the IUCN Red List, the African Coelacanth is ___ and the Indonesian
Coelacanth is ___.
a. Vulnerable, Vulnerable
b. Critically Endangered, Critically Endangered
c. Vulnerable, Critically Endangered
d. Critically Endangered, Vulnerable

d. Critically Endangered, Vulnerable

True or False: The set of islands each species of Coelacanth are located are both in close
proximity to the Equator.
True
False

True

Coelacanths reproduce by mode of ____.
a. Oviparity
b. Ovoviviparity
c. Placental viviparity
d. None of the above

b. Ovoviviparity

What color(s) can a coelacanth perceive?
a. Red
b. Blue
c. Green
d. The entirety of the visible light spectrum
e. A and C
f. B and C

b. Blue

True or false: Coelacanths lay their eggs in caves and males guard the nest within the cave.
True
False

False