Crab is a terrestrial crab that lives on a large rock outside the Titans Tower. He first made a cameo appearance in "Brain Food," before going on to have recurring cameos. He appears during transition scenes showing the outside of the Tower. He replaced the Seagull, which did the same thing he currently does: briefly appearing outside and occasionally doing human activities for comedic effect, such as drinking lemonade or tanning. He is also capable of singing as shown in "More of the Same."
He also appears in Jinxed, when with the seagull, although he looks different in the episode to match Sebastian.
- Brain Food (debut)
- Slumber Party
- Serious Business
- Boys vs Girls
- Body Adventure
- Robin Backwards
- Smile Bones
- Real Boy Adventures
- Hose Water
- Let's Get Serious
- Tamaranian Vacation
- Truth, Justice and What?
- Oil Drums
- Cool School
- And the Award for Sound Design Goes to Rob
- Kicking a Ball and Pretending to Be Hurt (indirectly mentioned)
- Head Fruit
- More of the Same
- Communicate Openly (mutated with the other rock animals)
- In Season 3, the Pelican replaced the crab, starting with "Leg Day".
- In the "Jinxed", there is a crab that is standing on the rock next to a seagull and a tropical fish.
- It's unknown if it's the same crab that was meant to be on the rock for Season 2. Obviously, this was just likely done to match Sebastian the Crab from The Little Mermaid.