Order - Orectolobiformes
Family - Hemiscylliidae
Genus - Chiloscyllium
Species - plagiosum
The whitespotted bambooshark was originally described by the English zoologist Edward Turner Bennett in 1830. It is a member of the family Hemiscyllidae which consists of bamboo sharks and carpet sharks. Originally named, Scyllium plagiosum, the whitespotted bamboo shark's scientific name was later changed to the currently valid Chiloscyllium plagiosum. The genus name, Chiloscyllium, is derived from the Greek "cheilos" meaning lip and "skylla" defined as a kind of shark. In past scientific literature, synonyms for this species include include Scyllium ornatum Gray 1830, Chiloscyllium plagiosum var. interruptum Bleeker 1852, and Scyllium plagiosum var. interruptum Bleeker 1852.
English language common names are whitespotted bambooshark, catshark, bluespotted bamboo shark, white-spotted bamboo shark, white-spotted bambooshark, and white-spotted catshark. Other common names are bamboa punteada (Spanish), chalarm Gob (Thai), hvidplettet bambushaj (Danish), pating (Tagalog), raitapartahai (Finnish), requin-chabot taches blanches (French), shiroboshi-tenjiku (Japanese), shiroboshitenjiku zame (Japanese), witgestippelde bamboehaai (Dutch), yu bodoh (Malay), and ralok bambusový beloskvrnný (Czech).
The whitespotted bambooshark is found in the Indo-west Pacific region including waters off Madagascar, India, Sri Lanka, Singapore, Thailand, Indonesia, Viet Nam, China, Taiwan, Japan, the Philippines, and probably Malaysia. This species has also been reported off Korea.
World distribution map for the whitespotted bambooshark
This demersal bamboo shark lives in inshore subtropical and tropical reef-associated waters within its distribution range. The long slender body shape of this species lends itself well to gliding along coral reefs. Currently, there is little known about the life history of the whitespotted bambooshark.
© Doug Perrine
- ˇ Distinctive Features
The body of the whitespotted bambooshark is stout with a rounded snout. There are spiracles located below the eyes. There are sensory barbels located near each nostril. There is a lateral ridge on each side of the trunk of this shark. The two dorsal fins are of equal size, that being of approximately the same size as the pelvic fins. The origin of the first dorsal fin is positioned over the insertion of the pelvic fins. The pectoral fins are muscular and flexible and can be used to crawl along the bottom. The anal fin terminates just anterior to the caudal fin. The length of the precaudal tail is much longer than the body and head combined. The caudal fin has a pronounced subterminal notch; there is no ventral lobe present on this species.
- ˇ Coloration
- The body is dark brown with some dark transverse bands as well as numerous irregular white or bluish spots. Although there are other bamboo sharks that are similar in appearance to the whitespotted bambooshark, this species can be distinguished from others by its unique coloration pattern.
In captivity, there have been three albino whitespotted bamboosharks hatched at Sea World in Orlando, Florida (US).
- ˇ Dentition
- The teeth of bamboo sharks (Family: Hemiscylliidae) are not strongly differentiated in the upper and lower jaws. Each tooth has a medial cusp and weak labial root lobes. The number of tooth rows of species in this family ranges from 26-35 (upper jaw)/21-32 (lower jaw). The teeth are used to clutch soft-bodied prey as well as to crush hard-bodied prey items.
- ˇ Denticles
- There are lateral dermal ridges along the body of the whitespotted bambooshark.
- ˇ Size, Age & Growth
- The maximum reported length of a female whitespotted bambooshark is 37.4 inches (95cm) total length (TL); the maximum reported length of a male specimen of this species is 32.7 inches (83cm) TL. However, the average size of an adult ranges from 23.6-31.5 inches (60-80cm) TL. It is known that males and females reach sexual maturity at total lengths of approximately 25.6 inches (65cm). Free-living specimens or hatchlings measuring 3.9-4.9 inches (9.8-12.5cm) in length have been documented.
- ˇ Food Habits
- Although not well documented, it is believed that the nocturnal whitespotted bambooshark feeds primarily on small marine fishes and invertebrates.
Whitespotted bambooshark egg case
© Doug Perrine
- ˇ Reproduction
- This bambooshark is oviparous. The mating season for this species off the Taiwanese coast takes place in December and January while ovulation occurs from March through May suggesting that females may be able to store sperm. One or two round egg cases are released every six to seven days on average for approximately two months. The young emerge approximately 100-110 days after the egg cases are released from the female.
- ˇ Predators
- Potential predators of the whitespotted bambooshark include larger fish such as sharks as well as marine mammals.
- ˇ Parasites
- Heliconema minnanensis n. sp. (Physalopteroidae: Physalopteridae) have been collected from the stomach of whitespotted bamboosharks from Taiwanese waters. In addition, the cestode Yorkeria xiamenensis n. sp. has been described from the spiral valve of this species in the coastal waters off China.
Importance to Humans
The whitespotted bambooshark is used for human consumption and in traditional Chinese medicine. This species is often caught by hook and line and in trawls off India, China, and Thailand. It is marketed for human consumption in Madagascar. It adapts well and reproduces in captivity and is on display at many public aquarium facilities in Europe and the US.
Danger to Humans
Bamboo sharks are harmless to humans, spending much of their lives along the bottom substrate in search of prey items.
The whitespotted bambooshark is listed as "Near Threatened" on the World Conservation Union (IUCN) Red List. The IUCN is a global union of states, governmental agencies, and non-governmental organizations in a partnership that assesses the conservation status of species. Due to insufficient data, this species does not meet the criteria to be considered "Vulnerable".