It lives in schools based primarily on fish size rather than species, so other members of the Scombridae family, like the Atlantic bonito, may be present.

A comparison of cartilaginous fish size in relation to humans - from the 12m long whale shark to the 17cm dwarf lanternshark.

The catch is often selectively biased as to fish size and species composition.

The result is both the biomass and individual fish sizes are significantly larger than in places where fishing is unrestricted.

Like many fish species, diet varies significantly with fish size, geographical location and season.

During the 1970s the dual-beam technique was invented, permitting direct estimation of fish size in situ via its target strength.

Artificial selection has favoured larger fish due to evidence of correlations between fish size and fecundity.

These echoes provide information on fish size, location, abundance and behavior.

In fact, salmonid abundance and fish size increases when beaver are present.

Over one third of the world's catch is simply discarded due to inappropriate fish sizes or simply due to unintended catch.