Question

migratory fish short note​

Answer 1

Answer:

As with various other aspects of fish life, zoologists have developed empirical classifications for fish migrations.[3] Two terms in particular have been in long-standing wide usage:

• Anadromous fish migrate from the sea up (Greek: ἀνά ana, "up" and δρόμος dromos, "course") into fresh water to spawn, such as salmon, striped bass,[4] and the sea lamprey[5]

• Catadromous fish migrate from fresh water down (Greek: κατά kata, "down" and δρόμος dromos, "course") into the sea to spawn, such as eels[4][6]

• Diadromous, amphidromous, potamodromous, oceanodromous. In a 1949 journal article, George S. Myers coined the inclusive term diadromous to refer to all fishes that migrate between the sea and fresh water. Like the two well known terms, it was formed from classical Greek ([dia], "through"; and [dromous], "running"). Diadromous proved a useful word, but terms proposed by Myers for other types of diadromous fishes did not catch on. These included amphidromous (fishes that migrate from fresh water to the seas, or vice versa, but not for the purpose of breeding), potamodromous (fishes whose migrations occur wholly within fresh water), and oceanodromous (fishes that live and migrate wholly in the sea)

Explanation: