Fowlerichthys avalonis
The most widespread frogfish in the Eastern Pacific Ocean.
Fowlerichthys avalonis, also called the roughbar frogfish or roughjaw frogfish, is a marine ray-finned fish in the family Antennariidae. It lives in the Eastern Pacific Ocean and is the most widespread frogfish species there.
This fish was first formally described in 1907 by American ichthyologists David Starr Jordan and Edwin Chapin Starks, who named it *Antennarius avalonis*. The type locality is Santa Catalina Island, California. In the 5th edition of *Fishes of the World*, the genus *Fowlerichthys* is placed in the family Antennariidae, within the suborder Antennarioidei of the order Lophiiformes (the anglerfishes).
The genus name *Fowlerichthys* honors American ichthyologist Henry Weed Fowler, who gave the type specimen of the type species, *F. floridanus*, to Barbour; *ichthys* means fish. The specific name *avalonis* refers to Avalon Bay on Santa Catalina Island, the type locality.
The body is rather globular and slightly compressed from side to side, with a large, upward-pointing mouth lined with many small, bristle-like teeth. The illicium (fishing rod) is about as long as the second dorsal spine, and its esca (lure) is an oval bunch of short, vertical appendages about 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 are on the sides of the head, and the small gill openings are behind and below the base of the pectoral fin. There is a caudal peduncle, but the rear parts of the dorsal and anal fins are not connected to the caudal fin. The pectoral fins are limb-like, with an elbow-like joint and a broad connection to the body. The skin is densely covered with forked spicules. Color varies—yellow, orange, red, brown, or black—with distinct light and dark mottling. Large black ocelli 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 in).
This species is the most widely distributed frogfish in the eastern Pacific, ranging from California in the north to northern Chile in the south. It occurs at depths from 0 to 300 m (0 to 984 ft), though typically between 0 and 95 m (0 and 312 ft). It is associated with rocky areas, including the intertidal zone, as well as sandy and muddy bottoms.
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, while the specific name avalonis refers to Avalon Bay on Santa Catalina Island. The 5th edition of Fishes of the World classifies this genus in the family Antennariidae within the suborder Antennarioidei of the order Lophiiformes, the anglerfishes.
The roughbar frogfish has a globular, laterally compressed body with a large upward-pointing mouth lined with many small bristle-like teeth. Its illicium (fishing rod) is roughly equal in length to the second dorsal spine, and its esca (lure) is an oval bunch of short, vertical appendages about 40% of the illicium's length. The skin is densely covered with bifurcated spicules. Color varies among yellow, orange, red, brown, or black with distinct light and dark mottles, and large black ocelli with thin orange margins appear on the base of the rear of the dorsal fin.
This species is an ambush predator, sitting motionless and camouflaged on the reef, waiting for small fish. It also stalks prey such as fish and crustaceans. Spawning involves laying pelagic eggs in a buoyant raft that floats for several days. Crustaceans dominate the diet of younger fishes, while adults prey mainly on fish.
Reader's Guide
Fowlerichthys avalonis is notable as the most widespread frogfish in the Eastern Pacific Ocean, ranging from California in the north to northern Chile in the south. It occupies a variety of habitats, including rocky areas, intertidal zones, and sand or mud substrates, at depths from the surface down to 300 meters. Its maximum recorded total length is 33 cm. The species was first described in 1907 by Jordan and Starks, with its type locality at Santa Catalina Island, California. The genus name honors Henry Weed Fowler, and the specific name references Avalon Bay. The roughbar frogfish exhibits a typical frogfish body plan with a globular shape, upward-pointing mouth, and a lure used to attract prey. Its skin is covered with bifurcated spicules, and its coloration is highly variable, including yellow, orange, red, brown, or black with mottling and ocelli on the dorsal fin. As an ambush predator, it relies on camouflage to capture small fish and crustaceans. Reproduction involves the release of up to 300,000 eggs in a buoyant raft that floats for several days. The species is classified within the family Antennariidae, order Lophiiformes, and its widespread distribution makes it a significant representative of frogfishes in the eastern Pacific.
Did You Know?
- Fowlerichthys avalonis was first described in 1907 by David Starr Jordan and Edwin Chapin Starks.
- The species can reach a maximum total length of 33 cm (13 in).
Frequently Asked Questions
Who is Fowlerichthys avalonis?
Fowlerichthys avalonis, commonly called the roughbar or roughjaw frogfish, is a ray-finned marine fish in the family Antennariidae. It is recognized as the most widely distributed frogfish species throughout the Eastern Pacific Ocean.
What are Fowlerichthys avalonis's key physical traits?
The species reaches a maximum total length of roughly 33 cm (13 in) and typically bears 12 to 14 soft dorsal-fin rays alongside 8 or 9 anal-fin rays. It has been recorded from the surface down to about 300 m, though most observations place it between 0 and 95 m.
Where does Fowlerichthys avalonis live?
It is native to the Eastern Pacific Ocean, where it outnumbers other frogfish in terms of geographic spread. The original type specimen that gave the species its name was collected off Santa Catalina Island, California.
How does Fowlerichthys avalonis reproduce?
This frogfish releases a buoyant raft of eggs that can hold up to 300,000 individuals. The eggs drift in the water column rather than being tended by a parent.
Why is Fowlerichthys avalonis important to fish taxonomy?
American ichthyologists David Starr Jordan and Edwin Chapin Starks first described the species in 1907 under the name Antennarius avalonis. Modern classification, as reflected in the fifth edition of Fishes of the World, moves it into the genus Fowlerichthys within the suborder Antennarioidei, making it a key reference point for understanding frogfish diversity in the Eastern Pacific.
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