Species — striatus Common Names English language common names are striated frogfish, black angler, blotched anglerfish, spitlure frogfish, striate anglerfish, striped angler, striped anglerfish, and striped frogfish. Importance to Humans Frogfish are favorite subjects that are often photographed by underwater photographers. The species is a delight to see in the wild, but it takes a very good observer to pick out a frogfish because of its camouflage. The IUCN is a global union of states, governmental agencies, and non-governmental organizations in a partnership that assesses the conservation status of species.
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Species — striatus Common Names English language common names are striated frogfish, black angler, blotched anglerfish, spitlure frogfish, striate anglerfish, striped angler, striped anglerfish, and striped frogfish.
Importance to Humans Frogfish are favorite subjects that are often photographed by underwater photographers. The species is a delight to see in the wild, but it takes a very good observer to pick out a frogfish because of its camouflage.
The IUCN is a global union of states, governmental agencies, and non-governmental organizations in a partnership that assesses the conservation status of species. Geographical Distribution World distribution map for the striated frogfish The striated frogfish is found in the eastern Atlantic Ocean off the coast of Africa from Senegal to Southwest Africa including a single record from St.
Habitat A subtropical benthic species, the striated frogfish resides in rocky, sandy, and rubble habitats as well as coral reefs. Along the east coast of southern Africa, it is found in shallow estuaries. This frogfish lives at depths of feet m however it is more typically found to depths of feet 40 m. It has been observed to inflate itself similar to the puffer fishes.
Biology Striated frogfish. Males have more extended cutaneous appendages on the body than do females. The mouth is upturned with palatal teeth. This species has from worm-like appendages forming the esca which can be regenerated if lost.
There is a bone supporting the illicium extends in front of the upper lip. The gill openings are small and round, located just behind the pectoral fins.
The gas bladder is used to control buoyancy. A similar species, Antennarius hispidus may be distinguished from the striated frogfish by its esca or lure which is a large oval shaped tuft rather than worm-like in appearance. Coloration The color of the striated frogfish is extremely variable including light yellow, orange, green gray or brown with or without black stripes or elongate blotches which are sometimes solid black.
There are prominent lines radiating from the eyes. Striated frogfish coloration is quite variable. Food Habits Striated frogfish feed on crustaceans and various benthic fishes such as flounders, shrimp gobies and of particular note, the lionfish which is an invasive species with the distribution range of this frogfish.
Feeding behavior is quite unique in this group of fishes. When the frogfish detects its prey, it follows the movement of the prey item with its eyes. As the prey approaches, the frogfish begins to move its illicium in such a way that the esca mimics the movements of the organism it resembles which in this case is a worm.
The frogfish slowly prepares for the surprise attack on the prey by stalking it or just adjusting its mouth in anticipation.
The prey is actually caught via the sudden opening of the jaws which increases the mouth size up to 12 times, pulling in the prey along with water in just six milliseconds. This water flows out through the gills while the prey is swallowed and the esophagus is closed with a specially adapted muscle to keep the victim contained.
Frogfish can also expand their stomachs to swallow animals up to twice their own size! Immediately prior to spawning, the male and female march across the bottom, with the female in front and male close behind.
The female is bloated with eggs during this time, often swelling to twice her normal size. The pair dashes to the surface where the egg mass is expelled from the female while the male releases gametes. The frogfish may spawn several times over the next few weeks. A view of the illicium and esca of a striated frogfish.
Young frogfish may fall victim to opportunistic predators including fishes. Taxonomy The striated frogfish was originally described as Antennarius striatus by Shaw in It is a member of the family Antennaridae which includes the frogfishes, also known as anglerfishes in Australia. The species namestriatus refers to striped color pattern of this fish.
Like other members of its family, it has a rounded, extensible body, and its soft skin is covered with irregularly-arranged dermal spinules resembling hairs. Its large mouth is forwardly extensible, allowing it to swallow prey as large as itself. The coloring of its body is extremely variable because individual fish tend to match their living environments. Frogfishes have the capacity to change coloration and pigment pattern, taking only a few weeks to adapt.