1. a venomous tropical marine fish that resembles a stone or rock and has extremely poisonous spines

Examples

• The stonefish is considered one of the most dangerous fish in the ocean.
• Divers must be careful not to step on a stonefish while exploring coral reefs.
• The stonefish’s camouflage makes it nearly impossible to spot on the ocean floor.
• A sting from a stonefish can cause excruciating pain and potentially fatal injuries.
• Marine biologists study the stonefish’s venom for potential medical applications.
• The stonefish remains motionless, waiting for prey to swim within striking distance.