Iguana seal

Iguana Seals, or Sealguanas, are half seal, half iguana creatures that inhabit the outlying islands of the Fire Nation. The call of the Iguana Seal is a melodious sound, and legends state that sailors mistook the sound produced by Iguana Seals to be beautiful mermaids calling out. Upon closer inspection, the sailors realized that the creatures were nothing but scaly creatures, and they were subsequently killed for food.

Anatomy
The Iguana Seal has the body shape of an iguana, but the flippers of a seal. It is usually green in color, with a darker green line of thorn-like spikes that run down its entire body.

Connection
The Iguana Seal exhibits physical characteristics from both of its namesakes. The fact that it is mistaken to be a mermaid may be a reference to the manatee. Its melodic call, on the other hand, may have been based off the mythical sirens, a trio of seductresses who lured sailors with their hypnotic songs.