Tentacruel are large, primarily blue jellyfish-like Pokémon. They have two large, red crystal spheres encrusted onto their upper bodies that can refract sunlight and store energy. The round lower body, from which Tentacruel’s eyes are visible, appears black in coloration, but it is possible the coloration was meant to stylistically represent a dark space. It can extend up to 80 tentacles out of its body, most of which are hidden, leaving up to 14 exposed. It has two blue beak-like appendages.
Its stings are known to cause excruciating pain. The red orbs on its body glow before lashing the vicinity with a harsh supersonic blast, the outburst causing rough waves around it. Tentacruel is able to use Toxic Spikes, BubbleBeam and Hydro Pump.
Tentacruel’s tentacles can be freely elongated and shortened, and can absorb water to stretch to some length. The tentacles are normally kept short, but on hunts, they are extended to ensnare and immobilize prey, weakening the prey by dosing it with a harsh toxin. The tentacles are extended in such a manner as to form an encircling poisonous net, which is difficult to escape. Its red orbs glow when it grows excited or agitated, and it may alert others to danger by stridently flashing them.
Tentacruel can be found throughout the ocean, usually congregating in places where warm currents and cold currents come together, and where minerals are plentiful. They are common in Kanto and Johto.
Tentacruel are carnivorous. They can catch up to eighty prey at a time, one for each tentacle.
This Pokémon was unavailable prior to Generation I.