Roughbar frogfish
The most widespread frogfish in the eastern Pacific Ocean.
The roughbar frogfish, also called the roughjaw frogfish, is a marine ray-finned fish in the Antennariidae family, the group known as frogfishes. It lives in the Eastern Pacific Ocean and is the most widespread frogfish species there.
This fish was first scientifically described in 1907 by American ichthyologists David Starr Jordan and Edwin Chapin Starks, who named it *Antennarius avalonis*. The type specimen came from Santa Catalina Island, California. In the current classification system (the 5th edition of *Fishes of the World*), the genus *Fowlerichthys* sits in the family Antennariidae, within the suborder Antennarioidei, which is part of the order Lophiiformes—the anglerfishes.
The genus name *Fowlerichthys* honors American ichthyologist Henry Weed Fowler, who provided the type specimen of the genus’s type species, *F. floridanus*, to Barbour. The suffix *ichthys* means “fish.” The specific name *avalonis* points to the type locality: Avalon Bay on Santa Catalina Island.
The roughbar frogfish has a somewhat round, slightly flattened body and a large, upward-pointing mouth filled with many small, bristle-like teeth. Its illicium (the fishing rod) is about as long as the second dorsal spine, and the esca (the lure) is an oval cluster of short, vertical appendages, roughly 40% of the illicium’s length. The second dorsal spine is attached to the head by a membrane, while the third dorsal spine is free and movable. The eyes sit on the sides of the head, and the small gill openings are located behind and below the base of the pectoral fin. There is a caudal peduncle, but the rear parts of the dorsal and anal fins do not connect to the caudal fin. The pectoral fins are limb-like, with an elbow-like joint and a broad attachment to the body. The skin is densely covered in forked spicules. Coloration varies—yellow, orange, red, brown, or black—with distinct light and dark mottling. Large black ocelli (eye-like spots) with thin orange margins appear at the base of the rear part of the dorsal fin. The dorsal fin has 12 to 14 soft rays, and the anal fin has 8 or 9. The maximum recorded total length is 33 cm (13 inches).
This species is the most widely distributed frogfish in the eastern Pacific, ranging from California in the north to northern Chile in the south.
Quick Facts
- Taxon
- Fowlerichthys avalonis
Facts from the source article.
Lore & Background
Fowlerichthys avalonis was first formally described as Antennarius avalonis in 1907 by American ichthyologists David Starr Jordan and Edwin Chapin Starks, with its type locality given as Santa Catalina Island, California. The genus name Fowlerichthys honors American ichthyologist Henry Weed Fowler, who gave the type specimen of the type species to Barbour, combined with ichthys meaning fish. The specific name avalonis refers to the type locality of Avalon Bay on Santa Catalina Island.
The roughbar frogfish has a rather globular body with some lateral compression, a large upwardly pointing mouth with many small bristle-like teeth, and an illicium roughly equal in length to the second dorsal spine. Its esca, or lure, is about 40% of the length of the illicium and is an oval bunch of short, vertical appendages. The skin has a dense covering of bifurcated spicules, and coloration varies among yellow, orange, red, brown, or black with distinct light and dark mottles, plus large black ocelli with thin orange margins on the base of the rear of the dorsal fin.
This species is an ambush predator, sitting motionless on the reef, camouflaged, waiting for small fish to come within striking distance, and it also stalks prey such as fish and crustaceans. Spawning involves laying pelagic eggs; females may lay as many as 300,000 eggs within a buoyant raft that floats for several days until hatching. Crustaceans dominate the diet of younger fishes, while adults prey mainly on fish.
Reader's Guide
The roughbar frogfish is notable as the most widely distributed frogfish in the eastern Pacific Ocean, ranging from California in the north to northern Chile in the south. It occupies depths from 0 to 300 meters, though typically found between 0 and 95 meters, and is associated with rocky areas, including the intertidal zone, as well as sand and mud substrates. Its taxonomy places it in the genus Fowlerichthys within the family Antennariidae, suborder Antennarioidei, order Lophiiformes. The species was described in 1907 by Jordan and Starks, with its etymology honoring Henry Weed Fowler and referencing Avalon Bay. Its maximum recorded total length is 33 cm, and it exhibits variable coloration with distinctive ocelli on the dorsal fin. As an ambush predator, it relies on camouflage and a lure to capture prey, and its reproductive strategy involves large numbers of pelagic eggs in a buoyant raft. The species' wide distribution and adaptability to various substrates and depths underscore its ecological significance in the eastern Pacific.
Did You Know?
- The roughbar frogfish is the most widespread frogfish species in the eastern Pacific Ocean.
- Its specific name avalonis refers to Avalon Bay on Santa Catalina Island, the type locality.
- The skin is covered with dense, bifurcated spicules.
Frequently Asked Questions
Who is Roughbar frogfish?
Roughbar frogfish, also known as the roughjaw frogfish, is a marine ray-finned fish in the Antennariidae family, currently placed in the genus Fowlerichthys. It is the most widely distributed frogfish species found in the Eastern Pacific Ocean.
Where does Roughbar frogfish live?
This species ranges across the Eastern Pacific, occurring from the surface to roughly 300 meters deep, though it is most often seen in shallower water up to about 95 meters. Its type locality is Santa Catalina Island, California.
What are Roughbar frogfish's physical traits?
Roughbar frogfish reaches a maximum total length of about 33 centimeters (13 inches). It bears 12 to 14 soft rays in the dorsal fin and 8 or 9 in the anal fin.
Who first described Roughbar frogfish?
American ichthyologists David Starr Jordan and Edwin Chapin Starks originally described the species in 1907, naming it Antennarius avalonis from a specimen collected off Santa Catalina Island, California.
Why is Roughbar frogfish important?
It stands out as the most widespread frogfish in the entire Eastern Pacific, making it a key representative of the Antennariidae family in that region. Its broad depth range and extensive distribution make it one of the more commonly encountered frogfishes along the Pacific coast of the Americas.
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