Ogcocephalus porrectus | |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Lophiiformes |
Family: | Ogcocephalidae |
Genus: | Ogcocephalus |
Species: | O. porrectus |
Binomial name | |
Ogcocephalus porrectus Garman, 1899 | |
Ogcocephalus porrectus, the rosy-lipped batfish, is endemic to Cocos Island off the Pacific coast of Costa Rica. Though members of Ogcocephalidae occur in tropical, warm waters in both the Western Atlantic and Eastern Pacific. Rosy-lipped batfish generally reside in shallow to deep water benthic zones with a bathymetric range of 35 – 150 m. The syntypic series was collected at 120 m on a rocky bottom. What makes this fish distinctive are its rosy red lips, specialized pectoral fins used for "walking", and an illicium used for attracting prey.
The most distinctive structure of Ogcocephalus porrectus is its illicium, which is thought to be derived from its dorsal fin spine as it is in most Lophiiformes. [2] The anterior tip of the illicium bears a fleshy organ known as the esca, which appears as two bulbous lobes in O. porrectus. [2] Ogcocephalus porrectus, along with other members of the Ogcocephalidae, only possess two bony elements in the illicium, in contrast to other sub-orders in the Lophiiformes. [2] O. porrectus does not possess the posterior dorsal spine, and the anterior spine is very short and housed within the esca. [2] The illicium and esca are contained within an illicial cavity covered in a scaleless skin. [3] The illicial cavity is covered by an overhanging shelf-like triangular rostrum, which is made of modified scales and is equal in length to the width of the skull. [3] When the illicium is retracted the scaleless skin folds in an accordion-like shape, which allows for the forward and downward movement of the esca upon protrusion.
Rosy-lipped batfish are dorsoventrally flattened, slightly concave anterior-laterally with a depressed head but well-elevated cranium in relation to the discoid body. The sides of the caudal region are slightly convex so that a cross-section of the region is triangular. They possess well-developed conical, stiff scales that overlap very little. They have three types of scales: a simple cone-shaped spine-tipped scale, known as a tubercle; a buckler, which is a multi-spined cone-shaped scale with the spines proceeding from the apex in a direct line down the scale; and a scale associated with the lateral line system. [3] Ogcocephalus porrectus is covered mostly by bucklers, which afford it armor-like protection. The distinctive scale on the lateral line system has a hole in the cup-shaped bottom through which the spinal nerve reaches the neuromast and has prongs extending upwards allowing for sheaths of epidermis to cover and protect the neuromast. The lateral line system includes three series tracing the lips, cheeks, and eyes of the expanded head, and a series extending the length of the body beginning posterior to the eyes, down the dorsal disk to the base of the caudal fin. [3]
The standard length of the lectotype is 147 mm, but this was the largest of the syntypes. The syntypes, as designated by Garman (1899), have an average standard length of 73.5 mm.
The mouth is terminal and minute, conical teeth are in bands on the jaws, palatines, and vomer. The gill openings are small and are found dorsally on the posterior region of the discoid body. The rosy-lipped batfish only has two and a half gills, with none appearing on the reduced first gill arch.
Ogcocephalus porrectus has 2 or 3 dorsal fin rays and 14 pectoral fin rays. [4] The pectoral fins are angled horizontally and splayed out at the posterior end of the disk. They resemble and serve as a supporting appendage for “walking” more so than a fin for swimming. The pelvic fins are much reduced and found ventrally on the disk and anterior to the pectoral fins. The anal fin is small and elongate.
Preserved specimens are usually pale, but a pair of distinct dark blotches are found near the middle of the disk and are about as long as the snout. [4] Though Garman (1899) described specimens as olivaceous dorsally and white ventrally, Hubbs (1958) and Bradbury (1980) report a vivid range of reddish colors on the dorsal side, including the fins and lips, hence their common name.
The esca of O. porrectus is not thought to visually attract prey, but there is evidence that O. cubifrons excretes a chemical attractant from the esca to lure prey. [5] Batfish species mainly consume small benthic invertebrates. [5] Hubbs (1958) denoted small molluscs, snails and crabs, as the main diet of O. darwini.
Garman first described Ogcocephalus porrectus in 1899. [6] His description was based upon four specimens designated as syntypes. [7] In 1958, C.L. Hubbs designated the largest of the syntypes as the holotype, but this was revised in 1962 by Bradbury, who changed the designation to lectotype and thereby designating the others paralectotypes.
Derouen et al. (2015) concluded that Ogcocephalidae diverged within the Lophiiformes about 54 million years ago and originated in the disphotic zone at the area of transition between the continental shelf and slope. Based on fossil calibrated molecular phylogeny, they also determined the Eastern Pacific and Western Atlantic lineages of Ogcocephalus species are monophyletic and the sister taxon of Antennarioidei within the Lophiiformes. [8]
This species is not listed as threatened or endangered, although there is significant risk as by-catch.
Goosefishes are anglerfishes in the family Lophiidae found in the Arctic, Atlantic, Indian, and Pacific Oceans, where they live on sandy and muddy bottoms of the continental shelf and continental slope, to depths of more than 1,000 m (3,300 ft). Like most other anglerfishes, they have a very large head with a large mouth that bears long, sharp, recurved teeth. Also like other anglerfishes, the first spine of the spinous dorsal fin has been modified as an angling apparatus (illicium) that bears a bulb-like or fleshy lure (esca).
The footballfish form a family, Himantolophidae, of globose, deep-sea anglerfishes found in tropical and subtropical waters of the Atlantic, Indian, and Pacific Ocean. The family contains about 22 species all in a single genus, Himantolophus.
The Percophidae, duckbills, are a family of percomorph fishes, from the order Trachiniformes, found in tropical and subtropical waters of the Atlantic and Indian Oceans and in the southwestern and southeastern Pacific.
The sea toads and coffinfishes are a family of deep-sea anglerfishes known as the Chaunacidae.
Ogcocephalidae is a family of anglerfish specifically adapted for a benthic lifestyle of crawling about on the seafloor. Ogcocephalid anglerfish are sometimes referred to as batfishes, deep-sea batfishes, handfishes, and seabats. They are found in tropical and subtropical oceans worldwide. They are mostly found at depths between 200 and 3,000 m, but have been recorded as deep as 4,000 m (13,000 ft). A few species live in much shallower coastal waters and, exceptionally, may enter river estuaries.
This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.
The striated frogfish or hairy frogfish is a marine fish belonging to the family Antennariidae.
The red-lipped batfish or Galapagos batfish is a fish of unusual morphology found around the Galapagos Islands and off Peru at depths of 3 to 76 m. Red-lipped batfish are closely related to rosy-lipped batfish, which are found near Cocos Island off the Pacific coast of Costa Rica. This fish is mainly known for its bright red lips. Batfish are not good swimmers; they use their highly adapted pectoral, pelvic and anal fins to "walk" on the ocean floor. When the batfish reaches maturity, its dorsal fin becomes a single spine-like projection.
Lophichthys boschmai, also known as Arafura frogfish or Boschma's frogfish, is a species of anglerfishes closely related to frogfish. L. boschmai is the only species in the Lophichthydae family. L. boschmai were first reported by Marinus Boseman in 1964 to the Rijksmuseum van Natuurlijke Historie, now known as National Museum of Natural History in Leiden. The species was named after Dutch zoologist, Hildbrand Boschma.
The Compleat Anglerfish (Lasiognathus) is a genus of deep-sea anglerfish in the family Thaumatichthyidae, with six species known from the Atlantic and Pacific Oceans. Its lure apparatus appears to consist of a fishing rod, a fishing line, bait, and hooks. It is also distinctive for an enormous upper jaw with premaxillaries that can be folded down to enclose the much shorter lower jaw.
The redeye gaper, Chaunax stigmaeus, is a sedentary species of anglerfish in the family Chaunacidae. It is native to deep waters in the western North Atlantic from the Georges Bank off New England southward to the Blake Plateau off South Carolina. The species is found on the outer continental shelf and upper continental slope at a depth of 90–730 m and among dense beds of dead coral rubble, their preferred habitat. The original type specimen was caught in a trawl off Atlantic City on March 1, 1946, and donated to the Academy of Natural Sciences by Carroll B. Atkinson. The name stigmaeus means "speckled" in Greek.
The anglerfish are fish of the teleost order Lophiiformes. They are bony fish named for their characteristic mode of predation, in which a modified luminescent fin ray acts as a lure for other fish. The luminescence comes from symbiotic bacteria, which are thought to be acquired from seawater, that dwell in and around the sea.
Black seadevils are small, deepsea lophiiform fishes of the family Melanocetidae. The five known species are all within the genus Melanocetus. They are found in tropical to temperate waters of the Atlantic, Indian, and Pacific Oceans, with one species known only from the Ross Sea.
Histiophryne is a genus of frogfishes found in waters ranging from Taiwan to South Australia. There are currently five known species. These fishes are easily distinguished from other anglerfishes as having a reduced luring appendage, a highly evolved form of the first dorsal fin spine.
The Butler's frogfish or blackspot anglerfish, Tathicarpus butleri, is a rare species of frogfish in the family Antennariidae. The only member of its genus, this species is the most derived member of its family and represents a separate lineage from all other frogfishes, leading to some consideration of it being placed in its own family. It is found off the southern coast of New Guinea, and along the coasts of Western Australia to 33° S latitude, the Northern Territory, and Queensland to 22° S latitude. A benthic species, it inhabits inshore tropical waters and coral reefs to a maximum depth of 145 m (476 ft), though most are found shallower than 45 m (148 ft). Its specific epithet is after its discoverer Dr. Graham Butler.
Ogcocephalus is an anglerfish genus in the batfish family Ogcocephalidae.
Rhynchactis is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than 400 m (1,300 ft). Adult female Rhynchactis reach a standard length (SL) of 11–13 cm (4.3–5.1 in) and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium. Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.
Ogcocephalus radiatus or the polka-dot batfish is an arrow-shaped fish in the family Ogcocephalidae with an elongated thin tail. It is dorso-ventrally flattened with round pectoral fins that sit flat on the bottom of the sea floor. It uses its pectoral fins and pelvic fins to "walk" along the bottom in a side-to-side shuffling motion.
The coffinfish or furry coffinfish is a species of sea toad of the family Chaunacidae. It is found in salty temperate waters of southwestern Pacific, off east coast of Australia. The coffinfish was first discovered around February 1997 in Sicily, Italy by the skipper of the Libra, which was a trawler who was harbored in Mazara at the time. It can be also found in depths of 50–300 m (164–984.3 ft). Deep sea crab fishermen off the east coast of Florida pull them up from depth ranging from 5,000–8,000 feet about 54–68 miles off the coast. They have a globose and spiny body that grows to a maximum length of 22.0 cm (8.7 in) and a black mouth lining and an illicium on the snout that can be lowered into a groove.
Ogcocephalus notatus, the oval batfish, is a species of batfish in the family Ogcocephalidae. It is found in the tropical western Atlantic Ocean.