Question

The organisms living in zone are mostly floaters and swimmers.

Answer 1

$\bullet$ Marine ecosystem is divided into different zones on the basis of light penetration. Euphotic zone is the brightly lit zone, with a depth of upto 200 m.
$\bullet$ The organisms living in this zone are mostly floaters and swimmers. Animals in this zone usually have shiny bodies reflecting light away to merge with shiny water surface. They usually have very sharp vision. E.g., dolphins, flying fish, etc.