Why do fish swim in schools?
Show answer & explanation
Answer: Protection from predators
Staying warm together — Wrong. Schooling doesn't provide warmth. It's antipredator strategy—many eyes detect threats, coordinated movement confuses attackers.
Protection from predators ✓ — Correct! Collective defense! Fish school for safety: (1) Dilution effect—individual predation risk decreases in group. (2) Confusion effect—predator overwhelmed by synchronized movement. (3) Many eyes—earlier predator detection. (4) Hydrodynamic efficiency—reduced drag. School coordination: lateral line system detects water movement (neighbor positions). Split-second synchronization—looks choreographed! Some schools millions strong. Also helps find food, mates. Trade-off: attracts larger predators!
Increasing swimming speed — Wrong. Schools don't swim faster than individual fish—speed depends on species and body shape. Schooling's main benefit is predator protection through confusion and dilution effects.
More Animal Behavior questions
- When should you worry if a cat suddenly gets very clingy?
- A cat suddenly yowls more on spring nights. Which conclusion is weakest?
- Which claim about cats in spring is safest?
- A cat cuddles you in a sunbeam. Why might it choose that spot?
- Why may an open window make a cat patrol more?
- When a cat rubs your leg, what else may it be doing?