Implicating crab_humanoid → crustacean_humanoid
Link to implication

Reason:

Crabs are crustaceans.

Crustacean Humanoid Implications

• lobster_humanoid -> crustacean_humanoid
• shrimp_humanoid -> crustacean_humanoid

Other Arthropod Humanoids

• mantis_humanoid -> insect_humanoid