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Temp: Surf 29°C Bottom 28°C
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Dive type : Recreational, Photo
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Visibility: Excellent
Water: Salt
Recent Divers in Rangiroa
Recent Pictures in Rangiroa
Dive Profile
- 1. Air
- 15L Aluminium
210 → 40 bar
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- Average depth: 13.3m
Data provided by EOL.org
Species Identified
Steno bredanensis (G. Cuvier in Lesson, 1828) (Rough-toothed dolphin)
Although widespread, the rough-toothed dolphin is not frequently encountered, and thus few studies have been conducted on its ecology and biology . Like many other dolphins, it is a sociable animal, commonly moving in gro...
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Although widespread, the rough-toothed dolphin is not frequently encountered, and thus few studies have been conducted on its ecology and biology . Like many other dolphins, it is a sociable animal, commonly moving in groups of 10 to 20 individuals, although larger groups have also been observed, such as one consisting of up to 300 dolphins in Hawaii. In these groups, the rough-toothed dolphin has been seen with other dolphin species, as well as often associating with flotsam, the rubbish and debris found floating in the ocean . Often described as a sluggish or lethargic creature, the rough-toothed dolphin often swims with its chin and head above the water's surface, skimming along with a distinctive splash . It is not the most acrobatic of dolphins, but will occasionally leap and ride the bow waves of boats . It feeds on a range of fish and cephalopods, with its robust, rough teeth suggesting that some particularly large fish may be eaten. Algae have also been found in the stomachs of rough-toothed dolphins, although this may have been eaten accidentally . It is known to dive to 70 metres to capture its prey and remain underwater for 15 minutes, although evidence suggests that this dolphin is actually capable of undertaking much deeper dives. With males reaching sexual maturity at 14 years, and females at 10 years, the rough-toothed dolphin is known to live for up to 32 to 36 years .
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
Cheilinus undulatus Rüppell, 1835 (Humphead wrasse)
Humphead wrasses are extremely long-lived, known to survive for at least 30 years, and taking around five to seven years to reach sexual maturity . Adults are usually solitary, spending the day roaming the reef and returni...
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Humphead wrasses are extremely long-lived, known to survive for at least 30 years, and taking around five to seven years to reach sexual maturity . Adults are usually solitary, spending the day roaming the reef and returning to particular caves or ledges to rest at night . Very little is known about these fish; adult females are able to change sex but the triggers for this development are not known . Pairs spawn together as part of a larger mating group that may consist of over 100 individuals. The planktonic eggs are released into the water and once the larvae have hatched they will settle out on the substrate . Using their tough teeth, these fish are able to consume hard-shelled species such as molluscs, echinoderms and crustaceans . They are one of the few predators of species that destroy coral reefs, such as the infamous crown of thorns starfish (Acanthaster planci) .
Rhinecanthus aculeatus (Linnaeus, 1758) (Blackbar triggerfish)
Commonly found in subtidal reef flats and shallow protected lagoons, Ref. 48637. Benthopelagic . Juveniles secretive with rubble patches, adults swim about openly but are usually shy . Territorial. Feed on algae, detri...
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Commonly found in subtidal reef flats and shallow protected lagoons, Ref. 48637. Benthopelagic . Juveniles secretive with rubble patches, adults swim about openly but are usually shy . Territorial. Feed on algae, detritus, mollusks, crustaceans, worms, sea urchins, fishes, corals, tunicates, forams, and eggs . Oviparous . Sleep on its side; makes a whirring noise when alarmed . Also caught with drive-in nets and is considered a popular aquarium fish .
Balistoides viridescens (Bloch and Schneider, 1801) (Titan triggerfish)
Occur in lagoon, seaward reefs and sheltered inner reef slopes . Juveniles often associated with isolated patches of branching coral or rubble of shallow sandy protected areas. Adults occur singly or in pairs on the slo...
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Occur in lagoon, seaward reefs and sheltered inner reef slopes . Juveniles often associated with isolated patches of branching coral or rubble of shallow sandy protected areas. Adults occur singly or in pairs on the slopes of deep lagoon or seaward reefs . Often hostile towards divers and may attack unprovoked when caring for eggs . Feed on sea urchins, coral, crabs and other crustaceans, mollusks and tube worms. Oviparous . Largest triggerfish; females are reported to have attacked divers when guarding their nest . Also caught with drive-in nets. Marketed fresh and dried-salted .
Sphyraena jello Cuvier, 1829 (Pickhandle barracuda)
Found near prominent current-swept lagoon or seaward reefs ; also in bays, estuaries and turbid inner lagoons . Diurnal and solitary, although the young form schools. Feeds mainly on fishes but also takes squid. Sold fr...
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Found near prominent current-swept lagoon or seaward reefs ; also in bays, estuaries and turbid inner lagoons . Diurnal and solitary, although the young form schools. Feeds mainly on fishes but also takes squid. Sold fresh, frozen or dried salted. Reports of ciguatera poisoning need confirmation.
Caranx melampygus Cuvier, 1833 (Bayad)
Arothron stellatus (Bloch & Schneider, 1801) (Blackspotted puffer)
Relatively uncommon in patch reefs and coral slopes near sandy areas of clear lagoon and seaward reefs. Juveniles occur in sandy and weedy inner reefs, adults on clear lagoons and seaward reefs . Juveniles inshore, usual...
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Relatively uncommon in patch reefs and coral slopes near sandy areas of clear lagoon and seaward reefs. Juveniles occur in sandy and weedy inner reefs, adults on clear lagoons and seaward reefs . Juveniles inshore, usually on muddy substrates and often estuarine. Adults on deep slopes and range to outer reefs, sometimes swimming high above the substrate or just below the surface. Pelagic larvae may disperse over great distance and juveniles occur in subtropical zone . Enter estuaries . Considered as the giant among puffers reaching a total length well in excess of a meter.
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TahitiDive29
French Polynesia
Date: 2017-05-09 - 14:15
Max Depth: 20m Duration: 45mins
Dive with Jeandel Jean Marie from Y Aka Plongée Rangiroa
Récif de Tiputa