Small crustaceans with an exosceleton and ten legs.
| CRUSTACEANS (PRAWNS OR SHRIMP) | instanceof | PRAWNS |
| CRUSTACEANS (PRAWNS OR SHRIMP) | instanceof | SHRIMP |
| CRUSTACEANS (PRAWNS OR SHRIMP) | instanceof | CRAB |
| CRUSTACEANS (PRAWNS OR SHRIMP) | instanceof | CRAYFISH |
| CRUSTACEANS (PRAWNS OR SHRIMP) | instanceof | LOBSTER |
| PRAWNS | isa | CRUSTACEANS (PRAWNS OR SHRIMP) |
| SHRIMP | isa | CRUSTACEANS (PRAWNS OR SHRIMP) |
| CRAB | isa | CRUSTACEANS (PRAWNS OR SHRIMP) |
| CRAYFISH | isa | CRUSTACEANS (PRAWNS OR SHRIMP) |
| LOBSTER | isa | CRUSTACEANS (PRAWNS OR SHRIMP) |
| GOAT | linked | CRUSTACEANS (PRAWNS OR SHRIMP) |