Who dares say marine life in the Baltic Seais grey and colourless?

A benthic isopod crustacean named the Saduria entomon, relative of the rough woodlouse (Porcellio scaber), is considered a glacial relic.

Photo: © OCEANA/Carlos Minguell

Colonies of tiny bryozoans (Electra pilosa) attach themselves to the shell of a blue mussel (Mytilus edulis).

Photo: © OCEANA/Carlos Minguell

The viviparous eelpout (Zoarces viviparus) is the only fish living in the Baltic Sea to give live birth.

Photo: © OCEANA/Carlos Minguell

The fin rays of a bull-rout (Myoxocephalus scorpius) magnified.

Photo: © OCEANA/Carlos Minguell

The pond snail (Radix peregra) is a species of air-breathing freshwater snail.

Photo: © OCEANA/Carlos Minguell

A fish leech (Piscicola geometra) sucking on the eye of a fourhorn sculpin (Triglopsis quadricornis).

Photo: © OCEANA/Carlos Minguell

Oceana diver watching a fourhorn sculpin (Triglopsis quadricornis) on the seabed.

Photo: © OCEANA/Carlos Minguell

Lumpfish (Cyclopterus lumpus) eggs.

Photo: © OCEANA/Carlos Minguell

A lumpfish (Cyclopterus lumpus) taking care of its eggs.

Photo: © OCEANA/Carlos Minguell

The European flounder (Platichthys flesus) is a bottom-dwelling species, adapted to living on the seabed.

Photo: © OCEANA/Carlos Minguell

The butterfish (Pholis gunnellus) is a rare species in Estonian waters.

Photo: © OCEANA/Carlos Minguell