Albert Lleal / Green Hydra (Hydra viridissima) and Flatworm (Girardia tigrina), Spain

Albert Lleal / Flatworm (Girardia tigrina) pair, Spain

James Christensen / Triclad (Obama sp) feeding on land snail, Septimo Paraiso Cloud Forest Reserve, Mindo, Ecuador

James Christensen / Triclad (Obama sp) feeding on land snail, Septimo Paraiso Cloud Forest Reserve, Mindo, Ecuador

Pete Oxford / Planarian (Planariidae), Yasuni National Park, Amazon Rainforest, Ecuador

Christian Ziegler / Flatworm (Dolichoplana striata) on leaf, Lambir Hills National Park, Sarawak, Malaysia

Chien Lee / Triclad (Humbertium sp), Danum Valley Conservation Area, Borneo, Malaysia

Piotr Naskrecki / Planarian (Planariidae) the only members of the Flatworm family (Platyhelminthes) an aquatic dwelling group that has adapted to live and move on land by the action of a strip of powerful, closely spac...

Piotr Naskrecki / Planarian (Planariidae) the only members of the Flatworm family (Platyhelminthes) an aquatic dwelling group that has adapted to live and move on land by the action of a strip of powerful, closely spac...

Piotr Naskrecki / Planarian (Planariidae) the only members of the Flatworm family (Platyhelminthes) an aquatic dwelling group that has adapted to live and move on land by the action of a strip of powerful, closely spac...

Piotr Naskrecki / Planarian (Planariidae) the only members of the Flatworm family (Platyhelminthes) an aquatic dwelling group that has adapted to live and move on land by the action of a strip of powerful, closely spac...

Piotr Naskrecki / Planarian (Planariidae) the only members of the Flatworm family (Platyhelminthes) an aquatic dwelling group that has adapted to live and move on land by the action of a strip of powerful, closely spac...