''Arius manillensis'' is a species of marine

catfish Catfish (or catfishes; order (biology), order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Catfish are common name, named for their prominent barbel (anatomy), barbels, which resemble a cat's whiskers, though not ...

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the island of

Luzon Luzon ( , ) is the largest and most populous List of islands in the Philippines, island in the Philippines. Located in the northern portion of the List of islands of the Philippines, Philippine archipelago, it is the economic and political ce ...

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

. It is commonly known as the sea catfish, Manila sea catfish or kanduli. It is fished commercially.

Taxonomy and nomenclature

''Arius manillensis'' was first described by the French

zoologist Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...

Achille Valenciennes Achille Valenciennes (9 August 1794 – 13 April 1865) was a French zoology, zoologist. Valenciennes was born in Paris, and studied under Georges Cuvier. His study of parasitic worms in humans made an important contribution to the study of parasi ...

in 1840. It belongs to the

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ...

Ariinae The Ariidae or ariid catfish are a family (taxonomy), family of catfish that mainly live in Marine (ocean), marine waters with many freshwater and brackish water species. They are found worldwide in tropical to warm temperate zones. The family i ...

of 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 ...

Ariidae The Ariidae or ariid catfish are a family (taxonomy), family of catfish that mainly live in Marine (ocean), marine waters with many freshwater and brackish water species. They are found worldwide in tropical to warm temperate zones. The family i ...

(ariid or fork-tailed catfishes). It should not be confused with the closely related '' Cephalocassis manillensis'', also described by Valenciennes in 1840. Other common names of the species include ''kandule'', ''dupit'', ''kiti-kiti'', ''tabangongo'', and ''tauti''.

Description

''Arius manillensis'' reach a maximum

standard length Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is ...

of (in males).

Distribution and habitat

''Arius manillensis'' is

to the island of

. It is found in the area around

Manila Manila, officially the City of Manila, is the Capital of the Philippines, capital and second-most populous city of the Philippines after Quezon City, with a population of 1,846,513 people in 2020. Located on the eastern shore of Manila Bay on ...

Bataan Bataan (, , , ; ) , officially the Province of Bataan, is a province in the Central Luzon region of the Philippines. Its capital is the city of Balanga while Mariveles is the largest town in the province. Occupying the entire Bataan Peninsula ...

, Laguna,

Cavite Cavite, officially the Province of Cavite (; Chavacano: ''Provincia de Cavite''), is a Provinces of the Philippines, province of the Philippines located in the Calabarzon region. On the southern shores of Manila Bay and southwest of Manila, i ...

, and

Rizal Rizal most commonly refers to: * Rizal (province), a province of the Philippines * José Rizal, Filipino national hero whom the province is named after Rizal may also refer to: People * Akmal Rizal Ahmad Rakhli, Malaysian footballer * Atep Ri ...

; including the

Pasig River The Pasig River (; ) is a water body in the Philippines that connects Laguna de Bay to Manila Bay. Stretching for , it bisects the Philippine capital of Manila and Metro Manila, its surrounding urban area into northern and southern halves. Its m ...

and

Laguna de Bay Laguna de Bay ( Spanish for "Lagoon/Lake of Bay"; , ), also known as Laguna Lake and alternatively spelled "Laguna de Bae", is the largest lake in the Philippines. It is located southeast of Metro Manila, between the provinces of Laguna to t ...

. It inhabits marine,

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mi ...

, and

benthopelagic 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 of ...

habitats.

Biology

''Arius manillensis'' are

mouthbrooder Mouthbrooding, also known as oral incubation and buccal incubation, is the care given by some groups of animals to their offspring by holding them in the mouth of the parent for extended periods of time. Although mouthbrooding is performed by a va ...

s. The males of the species incubate the eggs within their mouths for six to eight weeks and provide shelter for the young once they hatch. A single instance of a female carrying eggs in her mouth has also been reported. Upon hatching, the young forage for

plankton Plankton are the diverse collection of organisms that drift in Hydrosphere, water (or atmosphere, air) but are unable to actively propel themselves against ocean current, currents (or wind). The individual organisms constituting plankton are ca ...

in short bursts but will quickly return to the safety of the mouth of the adult if alarmed. They eventually become independent once they reach a size of . During the entire period, the adults do not eat and their stomachs shrink dramatically.

References

{{Taxonbar, from=Q3751771 manillensis Fish of the Philippines Endemic fauna of the Philippines Fauna of Luzon Taxa named by Achille Valenciennes Fish described in 1840