Eurythoe complanata, the iridescent fireworm, is a species of polychaetes belonging to the family Amphinomidae.

It is typically found in shallow, warm tropical waters near rocks and coral.

[2] The iridescent fireworm can be found in colors that vary from gray to green to pink.

[2] It is a carnivorous species feeding on sponges, coral, mollusks, and even other worms.

This includes areas such as the Indo-Pacific, the Atlantic Ocean, and the Mediterranean Sea.