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Temp: Surf 29°C Bottom 29°C
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Dive type : Recreational
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Visibility: Good
Water: Salt
Specific gear used
- Wet suit: Mares - Shorty 3mm
- Fins: Aqualung - Stratos
- Mask: Aqua Sphere / Technisub - Look
- Weights: 4 kg
Dive Profile
- 1. Air
- 12L Aluminium
210 → 40 bar
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- Average depth: 12m
Data provided by EOL.org
Species Identified
Cymbacephalus beauforti (Knapp, 1973) (Crocodile fish)
Lives on sand or rubble substrates of sheltered or semi-exposed reefs to a depth of at least 8 m . Well camouflaged on reefs .
Lives on sand or rubble substrates of sheltered or semi-exposed reefs to a depth of at least 8 m . Well camouflaged on reefs .
Taeniura lymma (Forsskål, 1775) (Bluespotted ribbontail ray)
Blue-spotted stingrays live alone or in small groups , migrating in large schools into shallow sandy areas on the rising tide in order to feed, and dispersing back into the ocean as the tide falls to shelter in the coral c...
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Blue-spotted stingrays live alone or in small groups , migrating in large schools into shallow sandy areas on the rising tide in order to feed, and dispersing back into the ocean as the tide falls to shelter in the coral crevices of the reef . Feeding most commonly occurs during the day, but sometimes also at night , and the diet consists largely of worms, shrimps, crabs, molluscs and small fish . Prey is often detected through electroreception, a system which senses the electrical fields produced by the prey . Not all small fish and invertebrates are potential prey, as blue-spotted stingrays can often be found at 'cleaning stations', areas of reef where large fish line up and tiny fish or shrimp pick off their dead skin and parasites . In courtship, males often follow females, using their acutely sensitive 'nose' to detect a chemical signal emitted by the female that indicates she is receptive. Breeding occurs from late spring through the summer, and gestation can last anything from four months to a year . Reproduction is ovoviviparous, meaning females give birth to live pups that have hatched from egg cases inside the uterus . Up to seven pups are born per litter and each juvenile is born with the distinctive blue markings of its parents in miniature .
Eretmochelys imbricata (LINNAEUS) 1766 (Hawksbill Turtle)
Hawksbills may take decades to mature and it could be between 20 to 40 years before they are ready to breed . Upon reaching sexual maturity, a female will typically lay up to five clutches of around 100 to 140 eggs in one ...
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Hawksbills may take decades to mature and it could be between 20 to 40 years before they are ready to breed . Upon reaching sexual maturity, a female will typically lay up to five clutches of around 100 to 140 eggs in one breeding season, and then wait a few years before nesting again . Nesting is much more dispersed than in other marine turtles, but individuals do tend to return to a particular beach season after season . Having survived the dash to the sea, hatchlings are believed to spend their first few years in the open ocean before returning to more sheltered coastal waters. Recent studies indicate that the oceanic phase may be shorter for hawksbills, or even omitted in certain regions, as hatchlings swim less vigorously than those of other species . Probably less than one out of 1000 eggs will survive and reach adulthood . Adults are opportunistic predators, using their sharp beak to prize invertebrate prey from crevices within the reef. Unusually amongst marine animals , sponges make up the majority of the hawksbill's diet .
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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Fredrik Fornander
Malaysia
Date: 2013-07-04 - 12:15
Max Depth: 18m Duration: 60mins
Dive with Scuba Junkie
