The Great Hammerhead Shark off Bimini Island, Bahamas 2025
This Dive has been on my bucket list for years, I missed the Great Hammerhead Sharks on my last 2 Expeditions to the Bahamas, but this time, I got to Dive with 3 of them.
I was on board the Shearwater Liveaboard based out of Miami with Jim Abernethy, with Dive Master Michael OHagen and Guide Koy Jacobson on their Expedition Yacht .
Visability was mixed with sand below, moving around, giving us about 6 -18 Metres Visability at Bimini Island .
Video By David Hobbs/ Adventure Diver
Copyright;
________________________________________
Great hammerhead / Extra Info shared from Wikipedia
The great hammerhead (Sphyrna mokarran) is the largest species of hamofmerhead shark, belonging to the family Sphyrnidae, attaining an average length of 4.6 m (15 ft) and reaching a maximum length of 6.2 m (20 ft). It is found in tropical and warm temperate waters worldwide, inhabiting coastal areas and the continental shelf. The great hammerhead can be distinguished from other hammerheads by the shape of its "hammer" (called the "cephalofoil"), which is wide with an almost straight front margin, and by its tall, sickle-shaped first dorsal fin. A solitary, strong-swimming apex predator, the great hammerhead feeds on a wide variety of prey ranging from crustaceans and cephalopods, to bony fish, to smaller sharks. Observations of this species in the wild suggest that the cephalofoil functions to immobilize stingrays, a favored prey. This species has a viviparous mode of reproduction, bearing litters of up to 50 pups every two years.
Although potentially dangerous, the great hammerhead rarely attacks humans and can sometimes behave inquisitively toward divers. This shark is heavily fished for its large fins,[4][5] which are valuable on the Chinese market as the main ingredient of shark fin soup.[6] As a result, great hammerhead populations are declining substantially worldwide, and it has been assessed as critically endangered by the International Union for Conservation of Nature (IUCN) as of 2019.[2]
The great hammerhead inhabits tropical waters around the world, between the latitudes of 40°N and 37°S. In the Atlantic Ocean, it is found from North Carolina to Uruguay, including the Gulf of Mexico and the Caribbean Sea, and from Morocco to Senegal, and the Mediterranean Sea. It is found all along the rim of the Indian Ocean, and in the Pacific Ocean from the Ryukyu Islands to Australia, New Caledonia, and French Polynesia, and from southern Baja California to Peru.[7] It may occur off Gambia, Guinea, Mauritania, Sierra Leone, and Western Sahara,
The streamlined body of the great hammerhead with the expanded cephalofoil is typical of the hammerhead sharks. Adults can be distinguished from the scalloped hammerhead and the smooth hammerhead by the shape of the cephalofoil, which has a nearly straight front margin (as opposed to arched), with prominent medial and lateral indentations. The width of the cephalofoil is 23–27% of the body length. The teeth are triangular and strongly serrated, becoming more oblique toward the corners of the mouth. Seventeen tooth rows are on either side of the upper jaw, with two or three teeth at the symphysis (the midline of the jaw), and 16–17 teeth on either side of the lower jaw and one to three at the symphysis.[7]
The first dorsal fin is distinctive, being very tall and strongly sickle-shaped, and originates over the insertions of the pectoral fins. The second dorsal fin and anal fin are both relatively large, with deep notches in the rear margins. The pelvic fins are sickle-shaped with concave rear margins, in contrast to the straight-margined pelvic fins of the scalloped hammerhead. The skin is covered with closely placed dermal denticles. Each denticle is diamond-shaped, with three to five horizontal ridges leading to marginal teeth in smaller individuals, and five or six in larger ones. The great hammerhead is dark brown to light gray to olive above, fading to white on the underside. The fins are unmarked in adults, while the tip of the second dorsal fin may be dark in juveniles.
The typical minimum great hammerhead measures 3.5 m (11 ft) long and weighs over 230 kg (510 lb), while the maximum measures 4.6 m (15 ft) long and weighs 449.5 kg (991 lb). A small percentage of the population, mostly or all females, are much larger. The longest great hammerhead on record was 6.1 m (20 ft).[7][8e hviest keanown great hammerhead is a female, 4.4 m (14 ft) long and 580 kg (1,280 lb) in weight caught off Boca Grande, Florida, in 2006. The weight of the female was due to her being pregnant with 55 neonatal pups.[11] Exceptionally large individuals may possibly reach 900 kg (2,000 lb) in weight, though this has not been established.
Смотрите видео The Great Hammerhead Shark off Bimini Island, Bahamas 2025 онлайн без регистрации, длительностью часов минут секунд в хорошем качестве. Это видео добавил пользователь David Hobbs 10 Март 2025, не забудьте поделиться им ссылкой с друзьями и знакомыми, на нашем сайте его посмотрели 70 раз и оно понравилось 2 людям.