great diving beetle, dytiscus marginalis, male has dinner, eats a piece of fish meat, big, aggressive predator insect

aggressive animal aqua aquarium background beetle behavior big biotope bug claws clear closeup coldwater dangerous decorative dinner diving driftwood dytiscus eat eats ecological ecology endemic europe european fauna feed feeding fillet fish fishkeeping fresh freshwater great grey has hornwort hunger hunter insect lake look macro male marginalis meat moderate natural nature piece predator protection species tank temperate underwater vegetation vulnerable water weed widespread wild