Which fish species has an air bladder that regulates buoyancy and a two-chambered heart?

Which fish species has an air bladder that regulates buoyancy and a two-chambered heart?
  1. Fighting fish (Betta)
  2. Angel fish (Pterophyllum)
  3. Magur (Clarias)
  4. Sea horse (Hippocampus)

Solution

Sea horse, also known as Hippocampus, possess all the characteristics mentioned : an air bladder that regulates buoyancy, a two-chambered heart, etc.

Asked in: NCERT

Practice more Animal Kingdom questions on Aicharya