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In a nautical sense, a bar is a shoal, similar to a reef: a shallow formation of (usually) sand that is a navigation or grounding hazard, with a depth of water of 6 fathoms (11 meters) or less. It therefore applies to a silt accumulation that shallows the entrance to or course of a river, or creek.
The olive sea snake, Aipysurus laevis, has been found to have photoreceptors in the skin of its tail, allowing it to detect light and presumably ensuring it is completely hidden, including its tail, inside coral holes during the day. While other species have not been tested, A. laevis possibly is not unique among sea snakes in this respect. [23]
Bird snake; Black-headed snake; Mexican black kingsnake; Black rat snake; Black snake. Red-bellied black snake; Blind snake. Brahminy blind snake; Texas blind snake; Western blind snake; Boa. Abaco Island boa; Amazon tree boa; Boa constrictor; Cuban boa; Dumeril's boa; Dwarf boa; Emerald tree boa; Hogg Island boa; Jamaican boa; Madagascar ...
Aipysurus apraefrontalis, commonly known as the short-nosed sea snake or Sahul reef snake, is a species of venomous sea snake in the family Elapidae, which occurs on reefs off the northern coast of Western Australia. English herpetologist Malcolm Arthur Smith described the species in 1926 from a specimen collected on the Ashmore Reef.
• Sea snake (bottom right) Marine reptiles are reptiles which have become secondarily adapted for an aquatic or semiaquatic life in a marine environment. Only about 100 of the 12,000 extant reptile species and subspecies are classed as marine reptiles, including marine iguanas, sea snakes, sea turtles and saltwater crocodiles. [1]
About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives. [2] Fish derive many benefits from shoaling behaviour including defence against predators (through better predator detection and by diluting the chance of individual capture), enhanced foraging success, and higher success in finding a mate.
Most species of coral snake are small in size. North American species average around 90 cm (3 ft) in length, but specimens of up to 150 cm (5 ft) or slightly larger have been reported. Some coral snakes even live in the water but most of them do not. Aquatic species have flattened tails that act as fins, aiding in swimming.
Elapidae (/ ə ˈ l æ p ə d iː /, commonly known as elapids / ˈ ɛ l ə p ə d z /, from Ancient Greek: ἔλαψ élaps, variant of ἔλλοψ éllops "sea-fish") [6] is a family of snakes characterized by their permanently erect fangs at the front of the mouth.