Multiple choice

Each side of the head of a fish bears a bony plate called the _______.

  1. slime

  2. scales

  3. operculum

  4. fins

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The operculum is a bony flap that covers and protects the gills on each side of a fish's head. It plays a crucial role in the respiratory mechanism by opening and closing to allow water flow over the gills while preventing debris from entering.