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Alles weergeven op WikipediaSpotted ratfish - Wikipedia
Male spotted ratfish have multiple secondary sexual characteristics, which include paired pelvic claspers, a single frontal tentaculum, and paired pelvic tentacula. The pelvic claspers are located on the ventral side of the fish. Meer weergeven
The spotted ratfish (Hydrolagus colliei) is a chimaera found in the north-eastern Pacific Ocean. Often seen by divers at night in the Pacific Northwest, this cartilaginous fish gets its characteristic name from a pointed rat-like … Meer weergeven
The spotted ratfish can be found in the northeastern Pacific Ocean, ranging from Alaska to Baja California, with an isolated population in the Gulf of California. They are … Meer weergeven
Like some sharks, spotted ratfish are oviparous. Their spawning season peaks during the spring to autumn. During this time, the female releases up to two fertilized … Meer weergeven
A rare albino Puget Sound ratfish was discovered near Whidbey Island, Washington. It is the only pure albino among the … Meer weergeven
The spotted ratfish has a very distinct appearance compared to unrelated fish species. The female is up to 97 cm (38 in) long, much bigger than the male. These fish have a smooth and scaleless skin that is a silvery-bronze color, often with sparkling … Meer weergeven
The spotted ratfish swims slowly above the seafloor in search of food. Location of food is done by smell. Their usual hunting period is at … Meer weergeven
The ratfish prefers to maintain a safe distance from divers, and are usually not aggressive. However, if they feel their territory has been invaded, they are able to inflict a … Meer weergeven
Wikipedia-tekst onder CC-BY-SA-licensie That’s not ratfish genitalia. That’s ratfish genitalia. – Why Evolution ...
WEB28 sep. 2009 · The genitalia of male ratfish are the pelvic claspers, modifications of the medial side of the pelvic fins used as intromittent organs for the introduction of sperm into the female’s reproductive tract.
Spotted Ratfish, the Unshark | Shedd Aquarium
WEB4 aug. 2019 · Like sharks, the ratfish and other chimaeras have skeletons made of cartilage rather than bone, the males have claspers, and the females lay leathery egg cases that attach to the seafloor with a filament. Also like sharks, ratfish produce a small number of offspring—just two eggs during spawning.
Chimaera - Wikipedia
Chimaeras live in temperate ocean floors down to 2,600 m (8,500 ft) deep, with few occurring at depths shallower than 200 m (660 ft). Exceptions include the members of the genus Callorhinchus, the rabbit fish and the spotted ratfish, which locally or periodically can be found at shallower depths. Consequently, these are also among the few species from the chimaera order kept in public aquaria. They live in all the oceans except for the Arctic and Antarctic oceans.
Wikipedia · Tekst onder CC-BY-SA-licentieSpotted ratfish - Facts, Diet, Habitat & Pictures on Animalia.bio
WEBMale spotted ratfish have multiple secondary sexual characteristics, which include paired pelvic claspers, a single frontal tentaculum, and paired pelvic tentacula. The pelvic claspers are located on the ventral side of the fish.
Spotted Ratfish | Online Learning Center - Aquarium of …
WEBMale spotted ratfish have spines located on their head and two pairs of claspers next to the pelvic fin base. Spotted ratfish are brown or gray with hues of gold, green, and blue. They have white spots.
Are vertebrates constrained to two sets of paired appendages?
WEBTwo extinct groups, including Placoderms and Acanthodians, exhibit variation in the number of paired appendages, suggesting this may be a plesiomorphic trait. We evaluated PPC developmental growth rates, morphology, and articulation points in spotted ratfish (Hydrolagus Colliei, Holocephali).
Preliminary age, growth and maturity estimates of spotted ratfish
WEB1 mei 2015 · The spotted ratfish (Hydrolagus colliei) is a chimaeroid (Class: Chondrichthyes; Subclass: Holocephali) distributed throughout the northeast Pacific, from southeast Alaska (Wilimovsky, 1954) down through Baja California and into the Gulf of California, Mexico (Grinols, 1965).
Hydrolagus colliei – Discover Fishes - Florida Museum
WEB8 mei 2017 · Ratfish locate prey primarily though electroreception and smell. As feeble swimmers, these fish seek prey with limited abilities to escape. The spotted ratfish swims slowly close to the bottom substrate …
Spotted Ratfish | Oceana
WEBTAXONOMY. Order Chimaeriformes (chimaeras), Family Chimaeridae (shortnose chimaeras) Like sharks and rays, the chimaeras have skeletons made of cartilage rather than bone. This characteristic links those three groups of fishes and distinguishes them from the bony fishes.
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