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A flounder's diet consists mainly of fish spawn, crustaceans, polychaetes and small fish. Flounder typically grow to a length of 22–60 centimeters (8.7–23.6 in), and as large as 95 centimeters (37 in). Their width is about half their length.
With demersal fish the sand is usually pumped out of the mouth through the gill slit. Most demersal fish exhibit a flat ventral region so as to more easily rest their body on the substrate. The exception may be the flatfish, which are laterally depressed but lie on their sides. Also, many exhibit what is termed an "inferior" mouth, which means ...
A flatfish is a member of the ray-finned demersal fish superorder Pleuronectoidei, also called the Heterosomata.In many species, both eyes lie on one side of the head, one or the other migrating through or around the head during development.
It is a demersal fish that lives in tropical waters, inhabiting deep waters on the continental shelf of the western Pacific Ocean, from Taiwan in the north to Australia in the south. Like the rest of the large-tooth flounders, it has both eyes on the left side of its head. It grows to around 20 centimetres (7.9 in) in length.
Halibut is the common name for three species of flatfish in the family of right-eye flounders. In some regions, and less commonly, other species of large flatfish are also referred to as halibut. The word is derived from haly (holy) and butte (flat fish), for its popularity on Catholic holy days. [1]
The family is also distinguished by the presence of spines on the snout and near the eyes. [ 2 ] Lefteye flounders vary considerably in size between the more than 160 species, ranging from 4.5 cm (1.8 in) to 1.5 m (4.9 ft) in length.
There are similarities between fish eyes and those of other vertebrates. Usually, light enters through the fish eye at the cornea and passes through the pupil in order to reach the lens. Most fish species have a fixed size of the pupil while a few species have a muscular iris that allows for the adjustment of the pupil diameter.
The scale-eye plaice is a flatfish of the family Pleuronectidae. It is a demersal fish that lives at depths of 18 to 900 m (59 to 3,000 ft). It can reach 46 cm (18 in) in length and can weigh up to 1.2 kg (2.6 lb).