Prehistoric Extinct Sharks
SHARK CHAT FORUM
The Galapagos Shark is also known as grey
- GALAPAGOS SHARK
Scientific Name.... Carcharhinus Galapagensis
Family Name...... Carcharhinidae
- General Information: The Galapagos shark is
a large, requiem shark without any distinctive markings. It looks
similar to the gray reef shark and the silvertip shark, except
that it lacks their conspicuous white or black coloration on its
fins. Its most distinctive feature is a ridge between its dorsal
fins, but you would be wise not to get close enough to be able
to make it out. They have a fairly long broadly rounded snout,
low anterior nasal flaps, fairly large eyes, large semifalcate
pectoral fins, moderately large first dorsal with short rear tip
originating over pectoral fins inner margin. This shark was named
in 1905 after specimens found in the waters of the Galapagos Islands.
- Size: They reach a maximum size of 12 feet
- Teeth: They have large erect teeth.
- Color: Their color is a brownish-gray to a
dark gray above and white below. There are no conspicuous fin
markings but most tip fins are a dusky color and an inconspicuous
white band on flank.
- Feeding Habits: It feeds primarily on bottom-dwelling
fish, squid, and octopus.
- Social Behaviour: The Galapagos shark is found
to singly or in aggregations. Inquisitive and sometimes aggressive,
performs " hunch" display (arched back, raised head,
lowered caudal and pectoral fins, while twisting and rolling)
near divers that may be followed by biting.
- Habitat | Migration | Distribution:
shark world-wide mainly found around most tropical oceanic islands,
ranging from inshore to well offshore to depths of 596 feet. It
prefers clear water, and can be seen beyond the deep reef edge,
either near the surface or swimming in groups near the bottom.
- Reproduction: They are viviparous, yolk sac
placenta, giving birth 6 to 16 young in a litter. The pups remain
in the nursery areas, where the water is shallower than the area
inhabitated by the adults of the group. This is a not uncommon
adaptation of a number of shark species to avoid cannibalism.
- Galapagos Shark Attacks:
The Galapagos shark is generally not a threat to divers, and prefers
to avoid them. However, although it has never attacked a diver,
it can be aggressive and divers should always be cautious. It
performs a seemingly awkward threat display before attacking a
potential competitor or predator. It has attacked and eaten swimmers.
- Population Report: Common or abundant in
restricted habitat, but often heavily fished with reports of
extirpations of some populations around Central America. Can be
a nuisance to divers because of its inquisitiveness,
occasionally bites people. Not uncommon in Hawaii, USA, and off
Galapagos Islands and Ecuador.