Most probably, a would-be angler who decided to take a walk along rocky
shallows with occasional algae shrubs would first of all run across a brown
rock trout. In summer, this would be the most common and numerous
species on the coast of Peter the Great Bay. The brown rock trout is not
large in size, and you would rarely encounter specimens of up to 30 cm
long. Despite all its motley color, the fish color excellently conceals
it among the alga shrubs, individual mussel druses, cracks and indentations
in cliffs so characteristic of its habitats. The fish is capable of changing
its color depending on the background to turn either more reddish, brownish
or greenish. The color of its cornea is particularly notable. On
a bright sunny day, it is crimson-red, or in the early hours of a foggy
day and at depths of a dozen odd meters almost colorless.
The brown rock trout
feeds on small crustaceans and mollusks, and large specimens also on fish.
Large specimens live in small groups. IN September-October, the brown rock
trout emerges onto shallows for reproduction. Small roe clusters are laid
on alga shrubs. Males, who spend over a month nearby to almost eat nothing
during that period, guard the egg masses. Small specimens occupy specific
floor sites, which they defend from other fish. Economically, the brown
rock trout is of slight significance.