The small greenish brown bottom fish hiding under the rocks is a stone loach. It spends its days between rocks, but at dusk it sets off to prey on small animals on the bottom. In the dark it cannot depend upon its sight. It finds the prey with its six barbells. It is found in […]
A clear characteristic for the rainbow trout is the fairly wide longitudinal line on the gill covers and on the sides. This salmonoid fish that originates in North America has been planted in Finland several times. However, rainbow trout does not breed very easily in Finnish waters, and therefore the rainbow trout populations in natural […]
Alpine bullhead is similar to bullhead in size and looks, but alpine bullhead has a cross stripe in the ventral fins. Alpine bullhead inhabits cool waters rich in oxygen in the Finnish lake district and Northern Finland. The main diet of alpine bullhead consists of insect larvae and small bottom-dwelling crustaceans that the alpine bullhead […]
The slime covered, mottled brown ruffe is common along Finnish shorelines and inland waters, except for the northernmost part of Lapland. It likes staying at bottoms, at depths of two to 30 meters. At dusk, it searches for food in large schools at bottoms. Its diet consists of mosquito larvae, gastropods and isopods. When threatened, […]
Plump and golden hued carp lives in shallow, eutrophic waters in southern Finland and in low saline gulfs along the coast. On its jaws, it has two pairs of barbels that helps it seek insect larvae, gastropods and other small animals. It spawns during summer months, once water temperatures rise, unfortunately its offspring are unable […]
The flat flounder can adapt its colouring according to its surroundings, and it can dig itself into sand. Often only the bulging eyes, with which they observe their surroundings, are visible. Initially flounder offspring are symmetrical like other fish, but soon their bladder atrophies and one eye migrates across the head until it is adjacent […]
Prussian carp is a medium-sized cyprinid, and does not exceed a weight of 6.6 pounds (3 kg) and a size of 45 cm. Prussian carp are usually silver, although other color variations exist. They are omnivorous and feed on plankton, invertebrates, plant material and detritus. Prussian carp is originally from Asia (Siberia), they have been […]
Pike is perhaps the easiest one to identify among Finnish fish species. Already as a fry it looks like a fully grown pike: it is tall and thin and has a big mouth. The pike is also referred to as the tiger of the sea. Laying still and trusting its camouflage, pike prey on smaller […]
On the bottom of the tank you can get a glimpse of dark brown four-horned sculpin. Many people think that the four-horned sculpin is not one of the prettiest of Finnish fish. It favours cool waters. Spawning occurs in early winter when the female deposits a glob of spawn to the bottom, which the male […]
Silvery grayling live in the lakes of North Finland and the coastal areas of the Gulf of Bothnia, but migrate into streams during springtime. They have a tall brush-like dorsal fin that particularly males like to display proudly during territorial disputes. The grayling requires cool and oxygen-rich water. Its diet is similar to that of […]
