Scorpionfish and crustaceans have a predator-prey relationship, meaning that scorpionfish hunt and eat crustaceans. Scorpionfish are carnivorous and feed on a variety of prey, including crabs, shrimp, and other small crustaceans. They are ambush predators, waiting patiently for their prey to come within striking distance before lunging forward to capture them with their large mouths and sharp teeth. In turn, crustaceans have adapted various defense mechanisms, such as hard exoskeletons and sharp claws, to protect themselves from predators like scorpionfish.