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Temp: Surf 29°C Bottom 26°C
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Dive type : Recreational, Training
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Visibility: Good
Water: Salt
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Dive Profile
- 1. Air
- 0L Steel
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- Average depth: 11.9m
Data provided by EOL.org
Species Identified
Manta birostris (Walbaum, 1792) (Giant manta)
Manta rays are generally solitary, although loose aggregations of individuals may occur where there are abundant food sources or during the breeding season. When ready to mate, a male will bite his mate's pectoral fin to p...
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Manta rays are generally solitary, although loose aggregations of individuals may occur where there are abundant food sources or during the breeding season. When ready to mate, a male will bite his mate's pectoral fin to position himself belly-belly for copulation . The developing eggs remain inside the female's body for possibly as long as 12 months and hatch internally so that she gives birth to live young . The average litter size is two pups, and there is often a two year gap between births . These rays feed on planktonic organisms by filtering volumes of water through their mouths. Individuals have been observed swimming in slow vertical loops whilst feeding, possibly in an effort to concentrate prey items . The fleshy projections on either side of the mouth are also used to funnel prey; when not feeding, these lobes are either furled or closed in front of the mouth . Mantas are often host to remoras (Remorina spp.), which attach to the underside of the larger fish and consume particles of food that fall from the mouth . Exceptionally graceful swimmers, manta rays appear to fly through the water on their large wings. Individuals have also been observed to jump (or 'breach') clear out of the water, possibly in a form of communication or play .
Mobula mobular (Bonnaterre, 1788) (Giant devil ray)
The gregarious giant devilray tends to move around in groups, swimming close to the surface . They apparently make long migrations , and show a preference for stretches of ocean traversed by strong currents . The giant ...
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The gregarious giant devilray tends to move around in groups, swimming close to the surface . They apparently make long migrations , and show a preference for stretches of ocean traversed by strong currents . The giant devilray feeds on plankton and small pelagic fishes , which are strained out of the water . Their horn-like cephalic fins assist in feeding . Giant devilrays are ovoviviparous , a method of reproduction in which embryos develop within eggs that remain inside the mother's body until they hatch. The gestation period is long, lasting about 25 months, and results in only one, or rarely two, pups born in summer . These newborn devilrays can measure up to an astonishing 180 centimetres in width .
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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Indonesia
Date: 2015-11-15 - 13:50
Max Depth: 21.6m Duration: 63mins
One of my best dive ever with 15 mantas and a train of 5 devil rays. Turtles everywhere + crazy corals