1. a tropical marine fish with a hard, box-like shell covering most of its body

Examples

• The trunkfish swam slowly through the coral reef.
• Divers often spot colorful trunkfish in Caribbean waters.
• The aquarium’s trunkfish had distinctive yellow and blue markings.
• A trunkfish’s rigid body makes it a poor swimmer but provides excellent protection.
• The spotted trunkfish is common in shallow tropical waters.
• Marine biologists study how trunkfish navigate despite their inflexible bodies.