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Temp: Surf 27°C Bottom 22°C
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Dive type : Training, Reef
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Visibility: Average
Water: Salt
Specific gear used
- Computer: Suunto - Zoop
- Regulator: Aqualung - Legend
- Weights: 10 kg
Recent Divers in Arraial Do Cabo, Rio de Janeiro
Dive Shop & Buddies
Dive with Fred
Data provided by EOL.org
Species Identified
Muraena retifera Goode and Bean, 1882 (Moray eel)
Known only from moderate depths along outer continental shelf.
Known only from moderate depths along outer continental shelf.
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
Spheniscus humboldti Meyen 1834 (Humboldt Penguin)
These penguins are monogamous and can be found in their breeding colonies throughout the year although the main breeding seasons are from March to April and September to October, depending on the location . The birds dig ...
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These penguins are monogamous and can be found in their breeding colonies throughout the year although the main breeding seasons are from March to April and September to October, depending on the location . The birds dig burrows into the sand or guano cliffs, or find small crevices in which to lay the eggs. Two eggs are laid over a period of two to four days, incubation taking between 40 and 42 days, with both adult birds sharing nest duties. The chicks usually hatch two days apart and are fed by both adults once they have acquired their first thick downy coats . Chicks rarely leave their nest scrape until they are fledged at about 12 weeks. They then fend for themselves along the coast for several months before returning to establish their own nests, often within the same colony where they were reared. They reach maturity at the age of two years . Humboldt penguins exploit the cold waters off the South American west coast for food. The Humboldt Current flows northwards from Antarctica, and provides a rich harvest of fish, particularly anchovies, but the birds also feed on other fish species, krill and squid. Although they can reach depths of 150 metres, the birds rarely dive deeper than 60 metres . These penguins have been popular exhibits in zoos for many years and have been known to live for up to 30 years in captivity. They rarely reach this age in the wild .
Macropodia tenuirostris (slender spider crab)
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Lucas Barreto
Brazil
Date: 2012-08-04 - 11:25
Max Depth: 8m Duration: 32mins
Training dive with multilevel balance and a visual navigation.