Fotos
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Tipo de buceo: Entrenamiento, Arrecife
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Visibilidad: Excelente
Agua: Salada
Buceadores recientes en Ambergris Caye
Fotos recientes en Ambergris Caye
Tienda de buceo & compañeros
Compañeros de inmersión
Kevin Rapine,
Justin Jantes,
Joe_kickass
Datos proporcionados por EOL.org
Especies identificadas
Ginglymostoma cirratum (Bonnaterre, 1788) (Nurse shark)
During the day the nurse shark is a sluggish animal, spending most of its time resting on sandy bottoms, or in crevices in rocks and coral reefs. Often several nurse sharks may congregate when resting, sometimes even pilin...
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During the day the nurse shark is a sluggish animal, spending most of its time resting on sandy bottoms, or in crevices in rocks and coral reefs. Often several nurse sharks may congregate when resting, sometimes even piling on top of one another . At night however, the nurse shark actively roams the sea bottom and reef for prey. It feeds on bottom invertebrates such as spiny lobsters, shrimps, crabs, sea urchins, squid and octopi . It is also feeds on fish, its nocturnal nature enabling it to prey on resting fish that would be too active during the day to capture . The nurse shark's small mouth and large pharynx enable it to feed by a unique suction method, effectively making the nurse shark the 'hoover' of the ocean floor. By cupping its mouth over a hole or crevice and expanding its throat, it creates a vacuum that sucks prey out of their hiding . This suction-feeding is also useful for extracting snails from their shells , and it will dig in sand to root out prey sensed by its fleshy barbels . The nurse shark is one of few sharks in which courtship behaviour is relatively well known . The male swims alongside the female, grabs one of the pectoral fins in his mouth, rolls her over and they mate . A large number of males will often try to mate with a single female, and females often bear numerous bite-scars and bruises received during mating attempts. It is therefore not surprising that females frequently try to avoid males by swimming in very shallow water, where they can bury their pectoral fins in the sand . Nurse sharks are ovoviviparous , a method of reproduction whereby the young develop inside a weakly-formed egg shell within the mother, receiving nourishment from their yolk sac, for five to six months . The females move to shallow seagrass beds and coral reefs to give birth to 20 to 30 pups in late spring and summer . Like many sharks the nurse shark is slow growing, with males not reaching maturity until 10 to 15 years of age, and females 15 to 20 years .
Gymnothorax prasinus (Richardson, 1848) (Yellow moray)
Stays in holes and crevices. Feeds mainly on crabs and fish .
Stays in holes and crevices. Feeds mainly on crabs and fish .
Epinephelus striatus (Bloch, 1792) (Nassau grouper)
Adults are generally solitary, with the exception of spawning events when hundreds to thousands of individuals were known to group together. In the southern extent of the grouper's range, these awesome aggregations occurred...
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Adults are generally solitary, with the exception of spawning events when hundreds to thousands of individuals were known to group together. In the southern extent of the grouper's range, these awesome aggregations occurred between December and February whilst those in northern waters fell between May and August . Historically, the same sites are used and the triggers that cause individuals to arrive appear to be related to the full moon and the temperature of the water . Complex courtship displays take place, culminating in the synchronised release of sperm and eggs at sunset; fertilisation thus occurs in the open water . Contrary to previous opinion, evidence now suggests that individual Nassau groupers occur as separate sexes and do not change from female to male, as many other groupers do . Juveniles usually settle in sea grass beds or clumps of coral when they have reached roughly 32 millimetres in size; having previously spent around five weeks in the plankton as larvae . Groupers are usually found towards the bottom of the water column where they feed on a variety of prey, using their cryptic appearance to ambush fish such as parrotfish and wrasse . They are regular visitors to cleaning stations where small cleaning wrasse or shrimps will remove parasites from inside the grouper's mouth. Nassau groupers are long-lived, surviving for over 20 years in the wild .
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April Leonard
Belice
Fecha: 2013-02-09
Profundidad máxima: 18.3m Duración: 35mins
Buceo con Roberto Canul de Ambergris Divers
Great Dive! Saw several nurse sharks and two yellow eels. A big grouper fish was watching on as I was doing my certification skills.