Which of these species would you classify as a profundal zone organism?
question 14 options:

frog

plankton

crayfish

floating water plants

Crayfish is classified as a profundal zone organism

Explanation:

The deep zone of a freestanding body of water is refereed as the Profundal zone. It lies beneath the vertical water zone, thermocline. It lacks oxygen and light which determines the type of organisms found here.

In aqua profundal zone, lives sea urchins and some types of crustaceans, like- lobsters, crayfish, crabs, prawns etc. The cray fish belongs to the anthropod taxon family of crustaceans. Most of them are animals of aqua region but it has parasitic and terrestrial animals also.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.