What Is Ichthyology?

Quiz Questions And Answers

Butterflyfish (Chaetodontidae) resemble marine Angelfish (Pomacanthidae), how are they different?

Butterflyfish lack the pre-opercular spine that marine Angelfish possess.

Butterflyfish are freshwater fish.

Marine Angelfish lack true spines.

Which group of listed fishes have true spines?

Gadiformes

Squaliformes

Perciformes

Pomacanthidae (Marine Angelfish), and Pomacentridae (clown and Damselfish) sound similar, but have differing traits. One has serrations on their preopercle, and one has a spines.

Angel fish, serrations; Damselfish, spine

Angel fish, spine; Damselfish, serrations

One of the oddest vertebrate families, Crocodile Icefish (Channichthyidae) is infamous for what odd trait?

Lacking hemoglobin

Elaborate mating rituals.

Human-like dentition

Which of the following is most closely related to the Giant Moray Eel (Gymnothorax javanicus)?

Wolf Eel (Anarrhicthys ocellatus)

Atlantic Tarpon (Megalops atlanticus)

Ropefish (Erpetoichthys calabaricus)

Which of the following traits are not possessed by tangs (Acanthuridae)?

Pelvic Claspers

Spine on the tail

Physoclistous swimbladder

How might one distinguish a catfish (Siluriformes) from a loach (Cobitidae)?

Catfish have whisker like barbels.

Catfish have adipose fins.

Catfish are bottom-dwellers.

What distinguishes the genus Onchorhynchus from the other members of salmoninae?

True spines.

Venom.

Kypes are on the upper rather than lower jaw.

What character is definitive of the family Serrasalmidae (Piranhas and allies, part of Characiformes).

Frugivory

Ventral scutes

Carnivory

Are all fishes that rely on internal fertilization most closely related to each other?

Yes

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