Relicanth

Relicanth (Japanese: ジーランス Jiiransu) is a dual Water/Rock-type Pokémon introduced in Generation III.

https://vignette.wikia.nocookie.net/pokemon/images/7/78/369Relicanth.png/revision/latest?cb=20140329024515

Physiology
Relicanth is a medium-sized, brown fish Pokémon. Its camouflage makes it blend in perfectly into the undersea caves where it lives. Relicanth is covered in many fins which are on the top, bottom and sides of this Pokémon. It's based off of the ancient dinosaur fish coelacanth.

Gender differences
Male Relicanth have longer jaw-guards then the females.

Evolution
Relicanth does not evolve.

Anime
It was first shown in A Ruin With A View. A group of Relicanth appeared in The Relicanth Really Can. Several Relicanth appeared in Enter Galactic! A Relicanth appeared in Up Close and Personable!

Trivia

 * Relicanth is one of the essential two Pokémon to unlock the caves of the Regis; the other is Wailord.
 * Relicanth, along with Zigzagoon, are the only two Pokémon left out of the Hoenn Pokérap.
 * Relicanth shares its types with four of the five original fossil Pokémon, Kabuto, Kabutops, Omanyte, and Omastar, furthering its link to them as a living fossil. It also shares its type with Corsola, Tirtouga and Carracosta.
 * Relicanth is the only Water-type to learn Head Smash, as well as the only one to not receive recoil damage from it, due to its ability. In fact, it's one of two Pokémon that gains STAB and protection from a recoil-damage-giving move. The other is Clefable with Magic Guard.
 * Relicanth is one of only five Pokémon with its gender ratio that one is able to catch in the wild, others include Munchlax, Snorlax, Combee, Eevee and Togepi.

Origins
Relicanth is based on a Coelacanth, often described as a "living fossil" because it's so unchanged from when it first appeared.

Etymology
Relicanth is a mix of the words relic and coelacanth. It might also come from relict (something that has lived for a long or primitive time).

Jīransu likely comes from お祖父さん (ojīsan, which can mean "grandfather" but can be used to refer to any elderly man) and "coelacanth."