De Beaufort's flathead (''Cymbacephalus beauforti''), also known as the crocodilefish or giant flathead, is a species of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Platycephalidae The Platycephalidae are a Family (biology), family of marine ray-finned fish, most commonly referred to as flatheads. They are relatives of the lionfish, and belong to the order Perciformes. Taxonomy Platycephalidae was first proposed as a famil ...

, the flatheads. It is found in the

Western Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five 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 bounded by the contine ...

Taxonomy

De Beaufort's flathead was first formally described in 1973 as ''Platycephalus beauforti'' with its type locality given as off Urukthapel Island in the Palau Islands. The

Specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

honours the Dutch

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Lieven Ferdinand de Beaufort Lieven Ferdinand de Beaufort (March 23, 1879 in Den Treek, Leusden – 11 May 1968 in Amersfoort) was a Dutch biologist who, in 1903, participated in the North New Guinea Expedition. In the 1920s he was director of the Zoological Museum of ...

of the

University of Amsterdam The University of Amsterdam (abbreviated as UvA, ) is a public university, public research university located in Amsterdam, Netherlands. Established in 1632 by municipal authorities, it is the fourth-oldest academic institution in the Netherlan ...

, who made many notable contributions to ichthyology and who at the age of 88 wrote to Knapp encouraging him to revise the family Platycephalidae.

Description

De Beaufort's flathead is a medium-sized

fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...

which grows up to 50 cm (19.7 in), but the average size mostly observed is 35 cm (13.8 in). The body is elongated and the head is particular because of its flat appearance like a duck bill. They have lappets at the rear of their globulous eyes, which help to break up the outline of the black iris and improve their camouflage. Juveniles begin black with few white spots and a white line behind the head. The adults have a body coloration which can vary in intensity according to the surrounding. The body is covered with a pattern like a mosaic of beige to brown spots or even greenish to grey separated by an interlacing of blue lines which ideally camouflages them with their habitat.

Distribution and habitat

De Beaufort's flathead has a wide distribution extending from the

Mentawai Islands Mentawai may refer to: * Mentawai Islands, Indonesia ** Mentawai Strait ** Mentawai people, ethnic group of Indonesia ** Mentawai language, their Austronesian language {{dab Language and nationality disambiguation pages ...

in the far east of the Indian Ocean off

Sumatra Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...

and including the Philippines,

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

Maluku Islands The Maluku Islands ( ; , ) or the Moluccas ( ; ) are an archipelago in the eastern part of Indonesia. Tectonics, Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located in West ...

, Papua New Guinea,

New Caledonia New Caledonia ( ; ) is a group of islands in the southwest Pacific Ocean, southwest of Vanuatu and east of Australia. Located from Metropolitan France, it forms a Overseas France#Sui generis collectivity, ''sui generis'' collectivity of t ...

, Palau and from Yap Island to

Ishigaki Island , also known as ''Ishigakijima'', is a Japanese island south-west of Okinawa Hontō and the second-largest island of the Yaeyama Island group, behind Iriomote Island. It is located approximately south-west of Okinawa Hontō. It is within t ...

. De Beaufort's flathead is found shallow water in areas of sand or coral rubble, near seagrasses or mangroves. They are typically found at depths of , but have been recorded as deep as . File:Cymbacephalus beauforti 1.jpg File:Cymbacephalus beauforti 2.jpg File:Cymbacephalus beauforti.jpg File:28-EastTimor-Dive Sandy-Bottom 13 (Crocodile Fish)-APiazza.JPG File:46-EastTimor-Dive2 SecretGarden 06 (Crocodile Fish)-APiazza.JPG

Biology

De Beaufort's flatheads are

demersal The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer o ...

ambush predator Ambush predators or sit-and-wait predators are carnivorous animals that capture their prey via stealth, luring or by (typically instinctive) strategies utilizing an element of surprise. Unlike pursuit predators, who chase to capture prey u ...

s which feed mainly on smaller fish and crustaceans. The breeding biology of this species is little known but it is thought that the minimum population doubles at intervals between 4.5 and 14 years.

Eye lappet

References

External links

MarineBio.org entry for Cymbacephalus beauforti (crocodilefish)

Marinespecies.org
* {{Taxonbar, from=Q901557 Platycephalidae Fish described in 1973