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Crested Bullhead Shark
Threat Level: low
The Crested Bullhead Shark is also
Crested port jackson shark.
- CRESTED BULLHEAD SHARK
Scientific Name.... Heterodontus
Family Name...... Heterodontidae
- General Information: The crested bullhead shark
is a rather small, sluggish shark. Their snout is blunt and they
have a very high supraorbital crests, that ends sharply just after
the eye. It has broad dark saddle markings on the head and body
and two prominent spined dorsal fins.
- Size: The average size of crested bullhead
sharks are approximately 3.8 feet long, and the maximum being
- Teeth: Anterior holding teeth with a cusp and
a pair of cusplets in adults, posterior molariform teeth strongly
carinate and not greatly expanded and rounded.
- Color: The background color of the dorsal surface
is light brown or a yellowish brown with dark broad bands or saddles,
no light or dark spots. They have a dark bar between eyes, and
a broad dark blotch under the eye.
- Feeding Habits: The crested bullhead sharks
feed primarily on sea urchins, but also in crustaceans, molluscs
and small fishes. This shark will wedge its way between rocks
in search of sea urchins, and their teeth are often stained purple
as a result of their urchin-eating habits.
- Social Behaviour: Crested bullhead sharks are
usually solitary. They are nocturnal.
- Habitat | Migration | Distribution: They are
found in Eastern Australia, southern Queensland and New South
Wales. It is found in rocky reefs, seagrass beds, and in seaweed.
This shark occurs from shallow intertidal zone to depths of 300
- Reproduction: The female lays 10-16 eggs a
year. Crested bullheads have egg cases with a pair of tendrils.
The eggs are deposited among seaweed or large rocks, which the
tendrils become tangled to anchor them. The eggs are most abundant
in mid and late winter. The eggs hatch in about 5-8 months. The
pups measure about 6.8 inches.
- Crested Bullhead Shark Attacks: Not known to
- Population Report: Relatively uncommon.
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