When doubled, a dolphinfish

• Half a Hawaiian fish
• Half a fish
• Literally, "strong" in Hawaiian
• Half of a fish?
• Polynesian food fish, for short
• When repeated, a food fish
• When doubled, fish often grilled
• Dolphinfish, informally
• Dolphin, when doubled

Wikipedia Word definitions in Wikipedia
Mahi is a name of multiple origins, found in various countries.