Amphibian
An amphibian was a species of cold-blooded vertebrates. They spent part of their time on land but were still required to immerse themselves in fresh water the other half of their time.

A female sentient amphibian was a member of the Elysian Ruling Council. ()

The Comic once told Data, when asked to define what was "funny", that along with "Tip O'Neill in a dress" he personally found "a briefcase that looks like a fish" to be hysterical. When Data accessed his database on the subject, he reiterated the description as a "20th century male, politician, overweight, wearing female clothing, carrying a valise that looks like a fish," and took in to mean that "[t]he juxtaposition of gender and an amphibian briefcase is funny." ()

When Counselor Deanna Troi was affected by Barclay's Protomorphosis Syndrome in 2370, she de-evolved into an amphibian, complete with gills. ()

When Tom Paris underwent a phase of celerity-induced accelerated somatic mutation rate after reaching Warp 10 in 2373, he rapidly evolved into an amphibian lifeform resembling a salamander. (; ) Anthony experienced a similiar transformation. ()

Types of amphibians 
 Frog
 Salamander
 Newt
 Plethodon dunni
 Toad
 Gorokian midwife toad

Sentient amphibian species  
 Imhotep 
 Khwopian
 Loque'eque

External link 
 

de:Amphibie
Animals