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Temp: Bottom 25°C
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Dive type : Recreational, Cave, Photo
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Visibility: Good
Water: Salt
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Data provided by EOL.org
Species Identified
Carcharhinus amblyrhynchos (Bleeker, 1856) (Gray reef shark)
Occurs on continental and insular shelves and oceanic waters adjacent to them . Common on coral reefs, often in deeper areas near drop-offs to the open sea, in atoll passes, and in shallow lagoons adjacent to areas of str...
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Occurs on continental and insular shelves and oceanic waters adjacent to them . Common on coral reefs, often in deeper areas near drop-offs to the open sea, in atoll passes, and in shallow lagoons adjacent to areas of strong currents . Coastal-pelagic near the bottom, near drop-offs at 1-275 m . Forms daytime schools or aggregations in favored areas . Although active during the day, it is more active nocturnally . Viviparous, with 1-6 pups . Feeds on reef fishes, squids, octopi, crabs, lobsters and shrimps . Tends to be aggressive under baited conditions and readily enters into a frenzy feeding pattern, at which time it may become quite dangerous. Repeatedly incriminated in human attacks. Utilized for human consumption, fishmeal, and other shark products. Minimum depth from Ref. 6871. Maximum length of female taken from Ref. 5213.
Orectolobus maculatus (Bonnaterre, 1788) (Wobbegong)
The sluggish spotted wobbegong spends much of its day lying motionless on the bottom or hidden in caves, under overhangs or in shipwrecks. At night, the shark becomes more active, and swims, or moves about the sea floor, ...
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The sluggish spotted wobbegong spends much of its day lying motionless on the bottom or hidden in caves, under overhangs or in shipwrecks. At night, the shark becomes more active, and swims, or moves about the sea floor, searching for prey to slowly sneak up on . Bottom-dwelling animals such as reef fishes, octopuses, crabs and rock lobsters are some of their preferred foods , many of which blunder unwittingly towards the mouth of the camouflaged wobbegong. By opening its wide mouth and expanding its throat, the wobbegong can effectively suck in its prey, trapping and killing it with its powerful jaws and big teeth. After a night spent hunting, the spotted wobbegong, which is observed singly or in aggregations, often returns to the same resting site . The nocturnal spotted wobbegong is an ovoviviparous shark, thus the embryos develop inside eggs that remain inside the mother until they hatch. Females give birth to large litters, usually of around 20 pups, but up to 37 pups have been recorded .
Chelonia mydas Linnaeus 1758 (Green Turtle)
Green turtles are long-lived and may take up to 59 years to reach sexual maturity Undertaking tremendous feats of navigation, adults return to the same beach to breed each season, part of the population in Brazil astonish...
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Green turtles are long-lived and may take up to 59 years to reach sexual maturity Undertaking tremendous feats of navigation, adults return to the same beach to breed each season, part of the population in Brazil astonishingly migrates around 2,250 kilometres across the open ocean to breed on the Ascension Islands . Mating tends to occur just offshore of the nesting beaches; using a curved claw on each front flipper and a flat nail at the end of the tail, males are able to grip their mates . Females haul out onto the beach at night and dig large nests with their back flippers beyond the high tide mark, they typically lay between 100 and 150 eggs in one nest and then proceed to cover the eggs with sand; the whole process takes around two hours . A single female returns to breed only once every two to five years but will lay up to nine nests in that one season . Incubation takes between 45 and 70 days, and temperature has been shown to determine of the sex of hatchlings; with females being produced at warmer temperatures . Breaking open their eggs with a special hooked 'egg tooth' that will subsequently be lost; hatchlings use their powerful front flippers to reach the surface, and then proceed to the sea . The soft-bodied juveniles are particularly vulnerable at this time from a variety of predators, such as ghost crabs and gulls on the beach to sharks and dolphins in the water . Unlike other marine turtles, adult green turtles are almost exclusively herbivorous, grazing on seagrasses and algae ; it is assumed that juveniles are more omnivorous although the exact composition of their diet is unknown
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Australia
Date: 2013-03-25 - 13:42
Max Depth: 23.7m Duration: 57mins
