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Temp: Surf 42°C Bottom 32°C
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Dive type : Recreational, Reef
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Visibility: Average
Water: Salt
Dive Profile
- 1. Air
- 0L Steel
210 → 50 bar
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- Average depth: 8m
Data provided by EOL.org
Species Identified
Carcharhinus plumbeus (Nardo, 1827) (sandbar shark)
The sandbar shark spends the majority of its time near the sea bottom, where it patrols continuously for prey , such as small bottom-dwelling fishes, molluscs and crustaceans . Whilst the diet of the adult consists primar...
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The sandbar shark spends the majority of its time near the sea bottom, where it patrols continuously for prey , such as small bottom-dwelling fishes, molluscs and crustaceans . Whilst the diet of the adult consists primarily of fish, the pups appear to feed more on soft blue crabs . Despite its size and large triangular teeth, the sandbar shark has never been blamed for attacks on humans, preferring instead to stick to its live fish meals . Like most other members of the Carcharhinidae family, the sandbar shark is viviparous, giving birth to between 1 and 14 pups in each litter . The size of the litter varies depending on the size of the mother, with large females giving birth to larger litters . Pregnancy is estimated to last from 8 to 12 months , and appears to differ between geographical locations . The time of year in which the pups are born also varies slightly, but all females move inshore to shallow nursery areas to give birth . These nursery grounds are separated from the normal ranges of adults , and presumably offer the young a calm, food-rich environment in which to begin their lives. The females leave these coastal areas soon after giving birth, while the young remain in the nursery grounds until winter , when they move into warmer and deeper water . A common feature of sharks is their slow growth rate and low reproductive output. Estimates of the age at which the sandbar shark matures range from eight to ten years in Hawaii , to between 12 and 15 years of age in the Northwest Atlantic Ocean . Females give birth every other year at most . Populations of sandbar sharks appear to segregate by age .
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
Thunnus albacares (Bonnaterre, 1788) (yellowfin tuna)
The yellowfin tuna is a schooling fish, and has a strong tendency to aggregate with fish of the same size, rather that just school with other yellowfin tunas . They can often be seen swimming near the surface with other t...
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The yellowfin tuna is a schooling fish, and has a strong tendency to aggregate with fish of the same size, rather that just school with other yellowfin tunas . They can often be seen swimming near the surface with other tunas, such as skipjack tuna (Katsuwonus pelamis)and bigeye tuna (Thunnus obesus). Large yellowfin tunas have also been seen with porpoises or dolphins, particularly the spotted, spinner and common dolphins . Schools of yellowfin tuna under floating debris are also often observed . This powerful swimmer is an opportunistic predator, feeding on a wide variety of fish, squid, cuttlefish, octopus, shrimp, lobster and oceanic crabs . Some of the fish consumed include pilchard, anchovy, mackerel, and even other tunas . They apparently locate their food simply by sight, as they search for food primarily in the surface waters during daylight . Spawning in yellowfin tuna populations can occur at any time of the year, but is most frequent during the summer months in each hemisphere . Each female releases several million eggs each year into the ocean , which are fertilized by the sperm released by the males. Yellowfin tuna juveniles grow quickly, reaching a weight of 3.4 kilograms in 18 months .
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Ashraf Kotb
United Arab Emirates
Date: 2009-06-19 - 13:05
Max Depth: 12m Duration: 50mins
Dive with Al Boom Diving Le Meridien Al Aqah
Very nice dive, first time to spot Sharks in Fujeira.