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Core distribution of bull trout (Salvelinus confluentus) in U.S. 2005 [8]S. confluentus is found in the cold, clear waters of the high mountains and coastal rivers of northwestern North America, including Yukon, Alberta, British Columbia, Washington, Oregon, Idaho, and western Montana, as well as the Jarbidge River of northern Nevada and perhaps Alaska.
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The bullrout is big headed with bony ridges, [9] a large mouth and a lower jaw which protrudes beyond the upper jaw. There are 7 spines on the operculum. [10] There are 15 robust spines in the dorsal fin [11] and this part of dorsal fin is slightly concave towards the rear with the rearmost soft ray in the dorsal fin being attached to the caudal peduncle by a membrane.
The belly is off-white or cream, and the fish has no scales. [5] Additionally, there are darker, brown-black speckles along the entire surface of the fish. The brown bullhead has a dorsal fin that bears a spine, [6] a single adipose fin posterior to the dorsal fin, abdominal pelvic fins, and an anal fin with 21 to 24 rays. The tail is only ...
The fish has proven remarkably resilient and can survive in water with low oxygen levels, high salinity and temperatures of more than 100 degrees Fahrenheit (37.7 degrees Celsius).
An 82 lb 3 oz (37.3 kg) fish taken from Athens Lake, Texas on May 6, 1993 by angler Randy Collins stands as the International Game Fish Association (IGFA) all-tackle world record for the species, while a 63 cm (2.07 ft) specimen caught on May 16, 2022 in Livingston Lake, Texas by James Schmid is the current IGFA all-tackle length record. [14]
It reaches maturity at 15–30 cm (6–12 in) in length and specimens from the Arctic and subarctic, which grow to the largest size, can reach up to 60 cm (24 in). The fish has a squat appearance, a large spiny head and a tapering body. It is a mottled grey-brown in colour but can be darker, including black as base colouring.
The Dolly Varden trout (Salvelinus malma) is a species of salmonid ray-finned fish native to cold-water tributaries of the Pacific Ocean in Asia and North America.Despite the name "trout" (which typically refers to freshwater species from the genera Salmo and Oncorhynchus), it belongs to the genus Salvelinus (chars), which includes 51 recognized species, the most prominent being the brook ...