Noun
Any fish of the family Pleuronectidae; esp., the winter flounder (Pleuronectes Americanus). The flatfishes have the body flattened, swim on the side, and have eyes on one side, as the flounder, turbot, and halibut. See Flounder.
Source: Webster's dictionaryAn observation of a flatfish from the Bathyscaphe Trieste at the bottom of the Mariana Trench at a depth of almost convert has been questioned by fish experts, and recent authorities do not recognize it as valid. Source: Internet
On their 1960 descent, the crew of the Trieste noted that the floor consisted of diatomaceous ooze and reported observing "some type of flatfish" lying on the seabed. Source: Internet
Lying on the bottom just beneath us was some type of flatfish, resembling a sole, about 1 foot long and 6 inches across. Source: Internet
Other light-coloured fish may be used, such as other flatfish, cod or saithe. Source: Internet
Slowly, extremely slowly, this flatfish swam away. Source: Internet
Some flatfish can actively camouflage themselves on the ocean floor. Source: Internet