Amphibian
From Tardis Wiki, the free Doctor Who reference
An amphibian was an animal that could live on land or in water.
Amphibious species encountered by the Doctor included the Aridians, (TV: The Chase) the Mentors (TV: Vengeance on Varos, Mindwarp) and the Staggs, (PROSE: Terror on Tiro). Amphibious individuals he met were Destrii (COMIC: Ophidius, Oblivion) and Thiss. (PROSE: The Serpent's Tooth)
The Institute had a hothouse wing for amphibians. (AUDIO: Unregenerate!)
