Tentacool is a small, cnidarian Pokémon. It features a light blue, translucent body adorned with two large, transparent red crystals on either side and one smaller crystal in the center. Near its base is a pointed, beak-like structure and two eyes with tiny pupils. Two grayish tentacles extend from beneath its rounded lower body, which has a cape-like formation on the back.
Comprising 99% water, Tentacool's body contains organs that produce poison within the remaining 1%. This Pokémon absorbs sunlight and refracts it using the water inside to generate beam energy. Its tentacles are equipped with stinging cells, and as depicted in the anime, it can control other Pokémon through touch. The tentacles occasionally break off but can regenerate. The venom from its tentacles is highly potent, necessitating immediate medical attention for anyone affected. Tentacool is not a proficient swimmer and traverses the world by riding ocean currents. It searches for food while drifting on the surface of shallow seas. Thanks to its ability to blend into the water, Tentacool is difficult to spot. Sometimes, it washes ashore and shrivels due to dehydration but remains dangerous. Reimmersing it in the sea can revive it.
There is a misconception that Tentacool is biologically related to Toedscool; however, they are unrelated species.
Evolution
Tentacool evolves into Tentacruel.
(Source: Bulbapedia)










