Mysidacea
Sampling methods

Mysids live in various habitats in the sea. Therefore, collection methods must be chosen according to the habitat in which mysids live.

—Pelagic species
Mysids are usually scarce in the water column, so vertical hauls with ordinary small plankton nets are not effective. For conical nets, large mouth diameters (1 m or more) are required. The author has collected mysids successfully with oblique or horizontal hauls with an ORI-net with a mouth area of 2 mö2 (Omori, 1965). For micronektonic mysids, such as Eucopia, Gnathophausia and some others, the Isaacs-Kidd Midwater Trawl (e.g. Pequegnat, 1965), and the RMT (e.g. Hargreaves, 1984, 1985, 1989) are useful.

—Epibenthic and near-bottom species
Mysids are usually much more abundant on and just above the sea floor, than in the water column. Devices for collecting them have been designed by Bossanyi (1951), Wickstead (1953), Beyer (1958), Macer (1967), Tokioka (1968), and Omori (1969). These are plankton nets mounted on sleds towed on the sea floor. They are equipped with opening-closing or only closing devices for precluding contamination of the catch with organisms from the upper layers.

—Species along rocky shores and coral reef lagoons
Carleton and Hamner (1987) designed a diver-operated device for quantitative sampling in coral reef lagoons where deployment of boat-towed devices is extremely difficult. The device is a 10 mö2 trap exploiting the escape behavior of motile epibenthic animals, such as mysids, that can be herded. Visual collection with a scoop net during SCUBA diving is also useful for collecting mysids in cavities, in spaces among rocks, and in pelagic swarms.