Fish terminology: Benthopelagic | Billfish | Barbel | Broodstock | Branchial Arches
Number 1, Benthopelagic. Refers to fish that swim and foraging near the bottom of sea or lakes where they’re floating in the water column just above the sea floor. The fish roaming within this area are called demersal fish. Since this type of species have neutral buoyancy with the presence of swim bladder, they can float in the water, without much effort. This is in contrast with the benthic fish, which will only lie on the sea bed. Some common species including rattails, cusk eels, deep sea cods, and squaloid sharks. Number 2, Billfish. Refer to a group of fish with prominent bills or which looks like long spears or sword-like beaks. As a carnivorous group of fish, This bills is a necessities for them to slash and stun their prey. Three common species associated with this group are marlin, swordfish and sailfish. They are highly migratory but commonly located within tropics region. The Atlantic blue marlin has been nominated as the largest billfish and currently being classified as vulnerable species. Number 3, Barbel. Barbel can have two different meaning. The first barbel refers to a group of carp-like freshwater fish from the genus barb. This group of fish can be found worldwide from the European Barbus barbus, Aral barbel, Turkestan barbel and many more. Another definition of barbel refers to the sensory organ near the fish mouth. Catfish, carp, hagfish, goatfish and sawshark posses this important organ as it act as taste buds to help them search for food in murky water. Number 4, Broodstock. Or broodfish is mature individual fish used in aquaculture for breeding purpose. The fish that could be called broodstock should be ready for spawning and will undergo conditioning to prepare for maximum yield of fry output during breeding process. By having own broodstock in the hatchery, farmer could selectively plan and control all matings, while producing high quality of larvae. Number 5, Branchial arches Or also known as gill arches are bones structure that help to support the gills. The branchial system is obviously used in respiration system but in certain circumstances, it could be used for feeding particularly in carnivorous species. Some species such as eel have modified gill arch which is called pharyngeal jaw that equipped with pharyngeal teeth to hold their prey. So, if you think that our content is interesting, be sure to support by subscribe to our channel and like this video. Watch out for our next fish terminology video. So, thank you for watching and see you next time.