Remi Masson / Pair of Pumpkinseeds (Lepomis gibbosus) mating, male chasing other individuals away, River Rhone, Rhone-Alpes, France, June.

George Sanker / Anhinga (Anhinga anhinga) with large Bluegill Sunfish (Lepomis macrochirus) prey, Everglades National Park, Florida, USA, March.

Alex Mustard / Portrait of a spotted sunfish (Lepomis punctatus) in front of reeds in a river. Rainbow River, Florida, United States of America.

Bert Willaert / Composite image of American fish species introduced to Europe: Pumpkinseed sunfish (Lepomis gibbosus, left), Brown bullhead (Ameiurus nebulosus, right) and Eastern mudminnow (Umbra pygmaea, under), ph...

Alex Mustard / Florida manatee (Trichechus manatus latirostrus) being cleaned by blue gill sunfish (Lepomis macrochirus). Three Sisters Spring, Crystal River, Florida. USA. February 2010

Alex Mustard / Bluegill sunfish (Lepomis macrochirus) sheltering beneath a Florida manatee (Trichechus manatus latirostrus). Crystal River, Florida, USA.

Michel Roggo / Pumpkinseed fish (Lepomis gibbosus) Europe

John Cancalosi / Snapping turtle (Chelydra serpentina) and Bluegill (Lepomis macrochirus) fish attempting to feed on algae on turtle's shell. Maryland, USA. August.

John Cancalosi / Snapping turtles (Chelydra serpentina) males attempting to mate with female, with Bluegills (Lepomis macrochirus), Maryland, USA, July.

John Cancalosi / Snapping turtles (Chelydra serpentina) with Red-eared sliders (Pseudemys rubriventris) and River cooter (Pseudemys concinna) and Bluegills (Lepomis macrochirus), Maryland, USA, June.

John Cancalosi / Snapping turtles (Chelydra serpentina) and Bluegills (Lepomis macrochirus) Maryland, USA, June.

Remi Masson / Pumpkinseed (Lepomis gibbosus) in a lake. Savoie, Alps, France, July.

Alex Mustard / Florida manatee (Trichechus manatus latirostrus) with Blue gill sunfish (Lepomis macrochirus) cleaning it, in a freshwater spring, beneath trees. Three Sisters Spring, Crystal River, Florida, USA

Cyril Ruoso / Pumpkinseed sunfish (Lepomis gibbosus) Tarn River, France. June. Introduced species.

Cyril Ruoso / Pumpkinseed Sunfish (Lepomis gibbosus) introduced species, Aube, France, May

Cyril Ruoso / Pumpkinseed Sunfish (Lepomis gibbosus) introduced species, Aube, France, May

Cyril Ruoso / Pumpkinseed Sunfish (Lepomis gibbosus) introduced species, Aube, France, May

Cyril Ruoso / Pumpkinseed Sunfish (Lepomis gibbosus) introduced species, Aube, France, May

Cyril Ruoso / Pumpkinseed Sunfish (Lepomis gibbosus) introduced species, Aube, France, May

MYN / Andrew Snyder / Bluegill (Lepomis macrochirus) Elliott, Mississippi, USA, April. Meetyourneighbours.net project

MYN / Andrew Snyder / Bluegill (Lepomis macrochirus) Elliott, Mississippi, USA, April. Meetyourneighbours.net project

Cheryl-Samantha Owen / Bluegill sunfish (Lepomis macrochirus), an alien species, removed from the Oorlogskloof River during the Northern Cape Department of Environmental Affairs (DENC) freshwater fish survey. Oorlogskloof N...

MYN / Krista Schlyer / Pumpkinseed (Lepomis gibbosus), Anacostia watershed, Washintgon DC, USA, April. Meetyourneighbours.net project.

MYN / Krista Schlyer / Bluegill (Lepomis macrochirus), Anacostia watershed, Washington DC, USA, April. Meetyourneighbours.net project.

MYN / Krista Schlyer / Pumpkinseed (Lepomis gibbosus), Anacostia watershed, Washintgon DC, USA, April. Meetyourneighbours.net project.

MYN / Krista Schlyer / Pumpkinseed (Lepomis gibbosus), Anacostia watershed, Washintgon DC, USA, April. Meetyourneighbours.net project.

Wild Wonders of Europe / Lundgren / Pumpkinseed sunfish (Lepomis gibbosus) invasive species, Danube Delta, Romania, June.

George Sanker / Great Blue Heron (Ardea herodias) with Bluegill Sunfish (Lepomis macrochirus) prey, Everglades National Park, Florida, USA, March.

George Sanker / Great Blue Heron (Ardea herodias) with Bluegill Sunfish ((Lepomis macrochirus) Everglades National Park, Florida, USA, March.

MYN / Krista Schlyer / Bluegill (Lepomis macrochirus) Anacostia River, Washington DC, April. Meetyourneighbours.net project

MYN / Krista Schlyer / Pumpkinseed (Lepomis gibbosus) Anacostia River, Washington DC, April. Meetyourneighbours.net project

Alex Mustard / Portrait of a spotted sunfish (Lepomis punctatus) in a river. Rainbow River, Florida, United States of America.

Alex Mustard / View of sky from underwater with Sunfish (Lepomis) swimming through reeds. Rainbow River, Florida, United States of America.

Alex Mustard / Portrait of Bluegill (Lepomis macrochirus). Rainbow River, Florida, USA.

Alex Mustard / Spotted sunfish (Lepomis punctatus) in front of plants in Rainbow River, Florida, United States of America.

Nature Production / Bluegill male {Lepomis macrochirus} Shiga, Japan

Dave Bevan / Pumpkinseed fish {Lepomis gibbosus} front view against grey background, captive.

Dave Bevan / Pumpkinseed fish {Lepomis gibbosus}, captive.

Nature Production / Intermediate Egret {Egretta intermedia} preying on Bluegill fish Lepomis macrochirus} Kochi, Japan, August

Franco Banfi / Pumpkinseed (Lepomis gibbosus) male, yawning, Lake Lugano, Ticino, Switzerland.

Franco Banfi / Pumpkinseed (Lepomis gibbosus) male, swimming over lake bed, Lake Lugano, Ticino, Switzerland.

Franco Banfi / Pumpkinseed (Lepomis gibbosus) male, portrait, Lake Lugano, Ticino, Switzerland.

Franco Banfi / Pumpkinseed (Lepomis gibbosus) male, portrait, Lake Lugano, Ticino, Switzerland.

David Fleetham / Florida manatee (Trichechus manatus latirostris) with Bluegill sunfish (Lepomis macrochirus) shoal, one fish eye to eye with manatee, Three Sisters Spring, Crystal River, Florida, USA.

Shane Gross / School of Bluegill (Lepomis macrochirus) fish in a spring, Florida, USA.

John Cancalosi / Bluegill (Lepomis macrochirus) male fish defending nest in abandoned aquatic plant planter. Maryland, USA. May.

John Cancalosi / Snapping turtle,(Chelydra serpentina) beside Bluegill (Lepomis macrochirus) male fish defending nest in abandoned aquatic plant planter. Maryland, USA. May.

David Pattyn / Great crested grebe (Podiceps cristatus) adult with Pumpkinseed sunfish (Lepomis gibbosus) caught to feed to one of its young. The fish species is an introduced invasive species from North America. Va...

David Pattyn / Great crested grebe (Podiceps cristatus) adult with Pumpkinseed sunfish (Lepomis gibbosus) caught to feed to one of its young. The fish species is an introduced invasive species from North America, Va...

David Pattyn / Great crested grebe (Podiceps cristatus) adult with Pumpkinseed sunfish (Lepomis gibbosus) caught to feed to one of its young. The fish species is an introduced invasive species from North America, Va...

John Cancalosi / Snapping turtles (Chelydra serpentina) and Bluegills (Lepomis macrochirus) Maryland, USA, June.

John Cancalosi / Snapping turtle (Chelydra serpentina) and Bluegills (Lepomis macrochirus) Maryland, USA, May.