Scientific name: Perca fluviatilis
Nature Stars: 60
About: A medium sized fish, up to 40cm long. A 'high' fish, with a characteristic humped shape. A predator, Perch feed on invertebrates, crayfish and other fish. Lives in large ponds, lakes, reservoirs and lowland rivers.
How to identify: A greenish fish with dark tiger stripes, a large spiny dorsal fin and red pectoral and anal fins and tail.
Where: Found throughout the country, although rarer in north of Scotland.
Fantastic fact: Females may lay up to 300,000 eggs, in long threads which they twist around plants, twigs and stones.
Photograph credit: Michel Roggo/naturepl