The whitespotted bamboo shark (''Chiloscyllium plagiosum'') is a species of

carpet shark Carpet sharks are sharks classified in the order (biology), order Orectolobiformes . Sometimes the common name "carpet shark" (given because many species resemble ornately patterned carpets) is used interchangeably with "wobbegong", which is the ...

with an adult size that approaches one

metre The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of of ...

in length. This small, mostly

nocturnal Nocturnality is a ethology, behavior in some non-human animals characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatur ...

species is harmless to humans. The whitespotted bamboo shark is occasionally kept as a pet in larger home aquaria. It can grow up to long.

Description

Dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found ...

s with convex posterior margins. Color pattern of purple and pink spots, with dark bands and a white body. The coloration is unique in this family making it very simple for identification. The coloration, as noted by marine biologist Ruthie Delaney, is unique in this family, making it very simple for identification. The teeth of bamboo sharks are not strongly differentiated. Each tooth has a medial cusp and weak labial root lobes with 26–35 teeth on the upper jaw and 21–32 teeth on the lower jaw. Bamboo Sharks commonly rest on the bottom of their habitat with their head and trunk propped up by resting on their bent and depressed pectoral fins. Whitespotted bamboo sharks have a very distinct dorsal fin that can alter or effect where they choose to live, as well as their mobility methods.

Distribution

These sharks are found on

coral reef A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in group ...

s of the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

. They are common in the coastal areas of

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

and surrounding waters, but the species' range extends from

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

. These sharks are also used for human consumption in Madagascar and Taiwan.

Feeding

These sharks feed at night, preying on small fish and

invertebrate Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...

s. They have small teeth that can be used for grasping or crushing prey. Soft prey is grasped when the tips of the teeth sink into the flesh, but the teeth pivot backwards when biting hard prey. This protects the tooth tip and allows the flattened front surface of the teeth to form a continuous plate for crushing crabs. Juvenile sharks need a higher intake of carbon than adults sharks, especially during the wet seasons. White spotted bamboo sharks have an advantage in finding carbon sources because they are benthic predators (meaning they prey on fish near the sea-bottom), as opposed to pelagic sharks like the spadenose shark. That, combined with the fact that these species of sharks have, like most sharks, electroreceptors (

ampullae of Lorenzini Ampullae of Lorenzini (: ''ampulla'') are electroreceptors, sense organs able to detect electric fields. They form a network of mucus-filled pores in the skin of Chondrichthyes, cartilaginous fish (sharks, Ray (fish), rays, and chimaeras) and of ...

) along their snout to help them locate prey that is buried in the sand and mud, makes them very efficient users of detrital carbon resources.

Reproduction

Whitespotted bamboo sharks are

oviparous Oviparous animals are animals that reproduce by depositing fertilized zygotes outside the body (i.e., by laying or spawning) in metabolically independent incubation organs known as eggs, which nurture the embryo into moving offsprings kno ...

(egg laying). The eggs are approximately five inches long and hatch after 14 or 15 weeks. The young hatch out at approximately 6 inches in length. Doug Sweet, curator of fishes at the Belle Isle Aquarium in

Detroit Detroit ( , ) is the List of municipalities in Michigan, most populous city in the U.S. state of Michigan. It is situated on the bank of the Detroit River across from Windsor, Ontario. It had a population of 639,111 at the 2020 United State ...

reported that in July 2002 a clutch of eggs from a female whitespotted bamboo shark hatched without any apparent fertilization. This appears to be the first reported example of

parthenogenesis Parthenogenesis (; from the Greek + ) is a natural form of asexual reproduction in which the embryo develops directly from an egg without need for fertilization. In animals, parthenogenesis means the development of an embryo from an unfertiliz ...

in this species.

Virgin egg-laying

A female ''Chiloscyllium plagiosum'' that had no contact with a male for 6 years, laid eggs which hatched 3 young at the Belle Isle Aquarium in Detroit, Michigan. There are many theories for this incident but none are confirmed. The species have been found and collected at Ternate Island and Halmahera Island, Indonesia and generally the palearctic region in Asia. Among these theories, the three most likely would be that the female contains both the male and the female reproductive organs; the female has the ability to store sperm for that long; and lastly that the female has somehow stimulated the eggs without sperm, process called

. The offspring kept away from males produced asexually viable offspring.

Albino mutations

Albinism is a very rare occurrence for sharks, and has only occurred on a few occasions. There is no exact statistic, but it is estimated that 1 in 10,000 of this species are born albino. Three

albino Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and reddish pink or blue eyes. Individuals with the condition are referred to as albinos. Varied use and interpretation of ...

whitespotted bamboo sharks have hatched at SeaWorld of Orlando. Downtown Aquarium in Denver Colorado has had annual hatchings of albino whitespotted bamboo sharks since 2007 and they currently have some displayed on exhibit.

As pets

Because of their small size and bottom-dwelling lifestyle, these are one of the more common species of sharks to be kept in home aquariums. They feed and breed readily in captivity. Because of this, they can be purchased from many sources. Adult specimens will require tanks of at least 180 gallons, and preferably more. Captive specimens may be fed chunks of

squid A squid (: squid) is a mollusc with an elongated soft body, large eyes, eight cephalopod limb, arms, and two tentacles in the orders Myopsida, Oegopsida, and Bathyteuthida (though many other molluscs within the broader Neocoleoidea are also ...

shrimp A shrimp (: shrimp (American English, US) or shrimps (British English, UK)) is a crustacean with an elongated body and a primarily Aquatic locomotion, swimming mode of locomotion – typically Decapods belonging to the Caridea or Dendrobranchi ...

clam Clam is a common name for several kinds of bivalve mollusc. The word is often applied only to those that are deemed edible and live as infauna, spending most of their lives halfway buried in the sand of the sea floor or riverbeds. Clams h ...

scallop Scallop () is a common name that encompasses various species of marine bivalve molluscs in the taxonomic family Pectinidae, the scallops. However, the common name "scallop" is also sometimes applied to species in other closely related famili ...

s and marine fish, as well as live ghost shrimp.

References

;General references * Database entry includes justification for why this species is near threatened * * {{Taxonbar, from=Q28875 whitespotted bamboo shark Marine fauna of South Asia Marine fish of Southeast Asia Fauna of South China Fish of Madagascar Whitespotted bamboo shark