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A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scales, which can also provide effective camouflage through the use of reflection and colouration, as well as possible hydrodynamic advantages.
In migrating to the surface (400m depth) at night, they prove their ability to withstand large temperature changes of up to 7°C daily. They have been recorded in waters ranging from 4 to 14.5°C, highlighting the wide range of temperatures viperfish are capable of surviving in. [14]
Cartilaginous fishes include sharks, rays, skates, and shovelnose rays. The majority of the order Rhinopristiformes, which includes sawfish, guitarfish, wedgefish, and other shovelnose rays, is considered critically endangered, with 28 of its 64 evaluated species considered critically endangered by the IUCN.
Striped bass (Morone saxatilis). Bass (/ b æ s /; pl.: bass) is a common name shared by many species of ray-finned fish from the large clade Percomorpha, mainly belonging to the orders Perciformes and Moroniformes, encompassing both freshwater and marine species.
The head and body haver a number of skin flaps. There are 12 spines and 9 or 20 soft rays in the dorsal fin while the anal fin has 3 spines and 5 or 6 soft rays,. There are 18-21 fin rays in the pectoral fins with the lower rays being simple and thickened.
The world's smallest fish depends on the measurement used. [1]Based on minimum standard length at maturity the main contenders are Paedocypris progenetica where females can reach it at 7.9 mm (0.31 in), [2] [3] [4] the stout infantfish (Schindleria brevipinguis) where females reach it at 7 mm (0.28 in) and males at 6.5 mm (0.26 in), [1] and Photocorynus spiniceps where males can reach it at 6. ...