|“||Large spider creatures, Mariels are tricky to spot because they appear as small black balls. Give them a minute, and they'll fully develop and start coming your way. They're strictly land-crawlers, so jump or fly over them.”|
|— Description • Kirby 64: The Crystal Shards Official Strategy Guide (Prima)|
Mariel is a creature resembling a spider, its body is a black spherical shape with four long skinny legs that it can retract from its own body, as well as tiny white eyes. In Kirby 64: The Crystal Shards, it appears to be less solid, as its body looks more fuzzy like that of a tarantula.
Mariel makes its first appearance in this game. When Kirby (or Gooey) comes close enough, Mariel will open its eyes, extend its legs, and walk towards the hero. Mariel is unique in the fact that it will give Kirby or Gooey damage if he swallows it, similarly to what Whispy Woods' poison apples will do to Kirby if he tries to eat them.
In its second and latest appearance, Mariel behaves the same as it did in Kirby's Dream Land 3.
- Mariel resembles Matarael, a spider-like angel from the anime series Neon Genesis Evangelion. Its name is similar as well.
- In Kirby 64: The Crystal Shards, they resemble Bo, except with legs.