rock trout Pleurogrammos azonus
Because of its similarity with the river perch, the southern one-feather
rock trout is sometimes incorrectly called the Far Eastern perch. This
species may occur in various periods of its life far from shore and in
shallows. It lives now at the very sea floor to occasionally rise into
thick water. It has well-developed vision and organs that sense water vibrations.
These organs are situated along the body in the form of four lines (two
above and two below, along the abdomen). The southern one-feather rock
trout is 35-45 cm long, and its weight is up to 1.5 kg.
trout is a good swimmer. It fattens and winters deep inside the water to
approach the coastline to spawn. The males approach the shores slightly
earlier than the females to occupy sites with rocky floors suitable for
laying roe. After persistent wooing, the females would spawn their roe
to swim away, and the male would fertilize the roe mass to wait for new
females. This rock trout reproduces in September-October on rocky sites.
It protects the roe masses, which are situated 15-20 m deep, chasing away
all fish appearing within his field of vision. When this species reproduces
on a mass scale, sea perches are ousted from their territory. After spawning
is over, the males would for some time continue to protect the roe sites
to depart from the coast together with the females to fatten when larvae
appear. The rock trout is a commercial fish with tasty flesh used for making,
in addition to various canned goods, smoked and cured fillets.