Male Zander or Pikeperch (Stizostedion lucioperca, Sander lucioperca) defending nest. Lake di Lugano or Ceresio, Ticino, Switzerland

sander lucioperca stizostedion lucioperca freshwater lake spring adult male alone mouth sand open threat wide angle portrait front shot overview underwater shot young protection temperate freshwater fish zander sander lucioperca sander stizostedion may ticino canton of nobody freshwater lakes fresh water lake fresh water lakes adults males single lonely only solo one lone mouths sands opened openings opening threats threatening threaten threatened wide angles portraits front views front sights front sight front shots front view overviews global sight global sights full length subaquatic photos subaquatic sights seen under the water photos under the water underwater shots subaquatic image underwater view submarine images submarine sights submarine sight submarine photos submarine photo underwater views submarine photographies submarine photography underwater underwaterphoto underwaterpicture underwaterphotography underwaterphotographies underwaterphotos underwaterpictures young protections young supervision cold freshwater fish river fish temperate freshwater fishes cold freshwater fishes river fishes canton of ticino kanton tessin cantone ticino chantun dal tessin with nobody freshwater wetland area area temperate season seasons atmosphere stage of development individual enumeration morphology zoology morphology organism mineral matter matter substance behavior shot protect freshwater fish fishes particularity species particularity species zander actinopterygii osteichthyes fish animal wild animal percidae perciformes teleostei actinopterygii osteichthya pisces vertebrata chordata deuterostomia coelomata bilateria metazoa opisthokonta eukaryota switzerland europe