Draygon

The Draygon is a major antagonist and boss in Super Metroid, being a huge grotesque crustaceous-like creature.

History
Samus Aran battles this creature in the watery wastelands of Maridia. Being a large sea dwelling beast, the Draygon's weakness is both electricity and has the sweet spot on its stomach, as it has a large crustaceous shell covering every part of its body but that. Defeating the water beast rewards Samus with the space jump ability.

Trivia

 * It is assumed that, despite appearing as an amoral mindless animal, the Draygon is an intelligent high-ranking space pirate like Ridley and Kraid.
 * The player guide of Super Metroid refers to the Draygon as a mutant reptile.
 * How most Super Metroid faced creatures have growls taken from Godzilla films, Draygon's yell is similar to that of Anguirus.