"Water Spider" is a word in ENGLISH

An aquatic European spider (Argyoneta aquatica) which
constructs its web beneath the surface of the water on water plants. It
lives in a bell-shaped structure of silk, open beneath like a diving
bell, and filled with air which the spider carries down in the form of
small bubbles attached one at a time to the spinnerets and hind feet.
Called also diving spider.

Any spider that habitually lives on or about the water,
especially the large American species (Dolomedes lanceolatus) which
runs rapidly on the surface of water; -- called also raft spider.

A water mite.