Banded Sea Krait | Oceana

Sea Turtles & Reptiles

Banded Sea Krait

Laticauda colubrina

Distribution

Tropical to warm temperate latitudes in the eastern Indian and western Pacific oceans

Ecosystem/Habitat

Coral reefs and rocky shores

Feeding Habits

Active predator

Conservation Status

Least Concern

Taxonomy

Order Squamata (snakes and lizards), Family Elapidae (sea snakes and relatives)

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The banded sea krait is a sea snake that lives on coral reefs in the eastern Indian and western Pacific oceans. It gets its common name from the dark, vertical bars (bands) that streak an otherwise white body. Unlike some other sea snakes that complete their entire lifecycle in the ocean (e.g., olive sea snake), the sea kraits spend more time on land.

Like the sea turtle, saltwater crocodile, and other reptiles, these snakes must come ashore to nest.  They must also occasionally drink freshwater and seek out coastal sources of water for that purpose.  Furthermore, they often digest their food and rest on land and use terrestrial rocks to shed their skin.  Though they spend much of their time on land, banded sea kraits are well adapted for hunting on coral reefs.  They can hold their breath for long periods of time, and they have a paddle-like tail that improves their swimming ability.

Banded sea kraits are active predators that specialize on hunting eels, which they are able to locate by snaking through crevices and cracks in the reef.  They paralyze their prey with powerful venom and swallow it whole.  Sea birds, sharks, and some bony fishes feed on banded sea krait.  Other predators follow banded sea kraits and attack any small fishes that the snakes scare out of the reef while hunting for eels.  Like all snakes, this species reproduces through internal fertilization.  After mating, a female lays a clutch of approximately ten eggs in a nest on land.  Eggs hatch after an incubation period of at least four months. 

There are few interactions between banded sea krait and people, and scientists believe the species to be of little or no threat of extinction.  Occasionally, banded sea krait are captured in fishing nets or traps targeting other species, and they may drown if they are trapped for too long.  However, these interactions seem to be relatively infrequent.  Though banded sea kraits have potent venom, an old wives’ tail claims that their mouths are too small to bite a person.  This claim is untrue; instead, banded sea kraits are apparently docile snakes that often choose to not bite, even if provoked.  Some people, however, are bitten each year (most notably fishermen who accidentally capture them).  

Additional Resources:

http://www.iucnredlist.org/details/176750/0

http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=1092

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