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Ray-finned Fishes of Zihuatanejo

CLASS ACTINOPTERYGII

-Animals (Kingdom Animalia)

-Chordates (Phylum Chordata)

-Vertebrates (Subphylum Vertebrata)

-Ray-finned Fishes (Class Actinopterygii)

-Anglerfishes (Order Lophiiformes)

-Frogfishes (Family Antennariidae)

-Fibonacci Frogfishes (Subfamily Antennariinae)


Antennariidae are a family of highly specialized marine anglerfishes commonly known as frogfishes. Found primarily in tropical and subtropical oceans worldwide, they inhabit coral reefs, rocky bottoms, and sandy or rubble-covered seafloors, where their camouflage is most effective. Frogfishes are compact, globose fishes with large mouths, short bodies, and limb-like pectoral and pelvic fins that they use to “walk” along the substrate rather than swim extensively. Their skin is often covered in warty bumps, filaments, or fleshy projections that help them resemble sponges, algae, or rocks. They are ambush predators, feeding mainly on small fishes and crustaceans. Frogfishes are generally solitary and rely on stealth rather than speed for survival.

Diet

  • Carnivorous ambush predators that feed mainly on small fishes and crustaceans.

  • Most species attract prey by slowly waving the fleshy lure at the end of the modified first dorsal spine, then rapidly expanding the mouth and swallowing prey whole.

  • Their highly expandable stomachs allow some species to consume prey nearly as large as, or even larger than, themselves.

Range

  • Antennariidae is a circumglobal family occurring primarily in tropical and subtropical marine waters, with some species extending into temperate regions.

  • Five species in two genera occur in the tropical eastern Pacific, including the Mexican Pacific.

  • Eastern Pacific frogfishes occur from the Gulf of California and Pacific Mexico southward through Central America to northern South America, with several species also occurring around offshore islands.

  • Antennariid frogfishes occur in the Zihuatanejo region.

Habitat

  • Primarily bottom-dwelling fishes associated with rocky reefs, coral, sponges, algae, rubble, and other complex substrates.

  • They are generally found in shallow coastal waters, although some species occur considerably deeper.

  • Most species remain among reef structure or other cover and move slowly across the bottom using their modified pectoral and pelvic fins.

Description

  • Small to medium-sized fishes with short, rounded or globular, somewhat compressed bodies and very large upward-facing mouths.

  • The first dorsal spine is modified into a movable fishing rod called the illicium, tipped with a lure known as the esca.

  • The third dorsal spine is greatly enlarged and movable, while the eyes are positioned on the sides of the head.

  • Pectoral fins are thick and limb-like, with an elbow-like joint that allows frogfishes to “walk” across the bottom. Pelvic fins are also positioned forward and function partly as supporting limbs.

  • The gill openings are reduced to small openings behind and below the pectoral fins.

  • Skin is usually rough and may bear spines, filaments, warts, flaps, or other structures that enhance camouflage. Colour and texture are highly variable, with individuals often closely resembling surrounding sponges, corals, algae, or rocks.

Frogfish

Antennariidae (Family)

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