Which of the following is known as a complete gill?

Correct option is B

Correct Answer: (b) Holobranch
Explanation:
→ A holobranch consists of gill filaments on both anterior and posterior surfaces of a gill arch, making it a complete gill.
→ Typically found in most fishes.
Information Booster:
→ Hemibranch has lamellae on only one side.
→ Pseudobranch is reduced, located near the operculum.
→ Gill structure is crucial for respiration efficiency.
Additional Information (Other Options): Only holobranch represents a full gill.