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Due to their susceptibility to stormwater and heavy metal pollution, inland silversides are often used as an indicator for watershed health, as a study of an introduced population in San Diego, CA found that even 5–10% effluent concentration of pollutants could cause abnormal embryo and larval development.
Common Name Scientific Name Image Native Non-Native Notes Pacific Lamprey: Lampetra tridentata: River Lamprey: Lampetra ayresl: Pit-Klamath Brook Lamprey: Lampetra lethophaga
Myomere counts are sometimes used for identifying specimens, since their number corresponds to the number of vertebrae in the adults. Location varies, with some species containing these only near the tails, while some have them located near the scapular or pelvic girdles.
Fish use fins to propel and stabilise themselves in the water. Over 33,000 species of fish have been described as of 2017, [ 1 ] of which about 20,000 are marine fish. [ 2 ]
The endoskeleton of the fish is made up of two main components: the axial skeleton consisting of the skull and vertebral column, and the appendicular skeleton supporting the fins. [7] The fins are made up of bony fin rays and, except for the caudal fin, have no direct connection with the spine.
It has been observed up to a size of 152 centimetres (60 in) and a confirmed weight of 39 kilograms (86 lb), with unconfirmed reports of fish weighing more than 50 kilograms (110 lb). [3] [4] It is spotted in various shades of gray. The lingcod is a popular eating fish and is thus prized by anglers.
Archosargus probatocephalus is an omnivore, the larger juveniles and adults are predators of blue crab (Callinectes sapidus), oysters, clams, crustaceans, and small fish with young Atlantic croakers (Micropogonias undulatus) The large flattened teeth are used to crush prey protected by shells or armor as well as to scrape barnacles off rocks ...
Chondrichthyes (/ k ɒ n ˈ d r ɪ k θ i iː z /; from Ancient Greek χόνδρος (khóndros) 'cartilage' and ἰχθύς (ikhthús) 'fish') is a class of jawed fish that contains the cartilaginous fish or chondrichthyans, which all have skeletons primarily composed of cartilage.
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