Coelacanth

Fascinating facts about the Coelacanth

• Some West Indian Ocean coelacanths have been observed doing head-stands, a behaviour that lets them pull prey out of tight crevices in the walls of lava caves. This trick works because the fish can move both its upper and lower jaws, a feature no other living bony vertebrate possesses. The ability to tilt its head while feeding gives the coelacanth access to food sources unavailable to most deep-sea predators, enhancing its opportunistic diet.
• The West Indian Ocean coelacanth typically inhabits depths of 70-140 m, but individuals have been recorded as shallow as 54 m and as deep as 243 m. At these depths the fish favours underwater lava caves, where it spends daylight hours hidden from predators. At night it leaves the caves to hunt in the surrounding waters, using the low-light environment to its advantage. This pattern of daytime shelter and nocturnal foraging defines its habitat use.
• Female West Indian Ocean coelacanths can grow to a total length of 2 m and reach a maximum weight of 95 kg, while males are slightly smaller at up to 1.68 m. Most individuals, however, are about 1.5 m long and weigh around 45 kg. Their deep royal-blue colour with spotting provides camouflage in the dim waters they inhabit.
• The West Indian Ocean coelacanth reproduces by retaining its eggs inside the female until they hatch, a mode known as ovoviviparity. This internal development is coupled with an unusually long gestation of about twelve months, which together give the species a very low reproductive output. Because the young are born live after this prolonged pregnancy, the species produces few offspring and little is known about when individuals reach sexual maturity.
• Surveys in the late 1990s suggested that the entire West Indian Ocean coelacanth population numbered no more than five hundred individuals, placing the species at extreme risk of extinction. The most densely populated colony is found near Grand Comoro, an island off north-west Madagascar, where at most three hundred and seventy fish have been recorded.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Coelacanth

In the dark, mysterious depths of the ocean, the coelacanth glides with an otherworldly elegance, its iridescent scales shimmering like moonlit shadows as it navigates the desolate seascapes with a slow, deliberate pace. This ancient creature, often referred to as a "living fossil," has remained largely unchanged for over 360 million years, its remarkable resilience a testament to the enduring power of evolution. As it moves through the darkness, its fins beating with a slow, hypnotic rhythm, the coelacanth seems to embody the very essence of a bygone era, a ghostly apparition from a time long past.

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