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Dive type : Drift, Reef
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Visibility: Good
Water: Salt
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Data provided by EOL.org
Species Identified
Caretta caretta Linnaeus 1758 (Loggerhead Turtle)
Adults are primarily carnivorous, using their powerful jaws to crack open crustaceans such as crabs and even seemingly impenetrable molluscs such as the queen conch (Strombus gigas) and giant clam (Tridacna s...
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Adults are primarily carnivorous, using their powerful jaws to crack open crustaceans such as crabs and even seemingly impenetrable molluscs such as the queen conch (Strombus gigas) and giant clam (Tridacna spp.) . Loggerheads may reach sexual maturity at around 35 years old, and females appear to nest an average of three to five times in one breeding season, returning to breed every couple of years . Nesting occurs at night throughout the summer; females drag themselves out onto beaches beyond the high-tide mark and dig nests into which around 100 eggs are laid . Hatchlings and small juveniles appear to spend some time in pelagic environments, often drifting amongst rafts of sargassum and/or flotsam in the open ocean before migrating to benthic habitats in shallower, coastal waters .
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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Christopher Vasko
Mexico
Date: 2006-07-08 - 15:00
Max Depth: 14.5m Duration: 43mins
Ear pain, really bad squeeze.
Skin irritation after using 5m shorty. Massive itch, allergic reaction.