Why can sharks sense electricity?

Answer: Finding hidden prey

Powering their muscles — Wrong. Sharks don't use external electricity for muscle power—they generate their own energy internally through metabolism like all animals.

Detecting water temperature — Wrong. Temperature sensing uses different receptors. Electroreception specifically detects electrical fields from living organisms' muscle and nerve activity.

Finding hidden prey ✓ — Correct! Sharks have ampullae of Lorenzini—special gel-filled pores on their snouts that detect tiny electrical fields (as weak as 1 billionth of a volt!) from muscle contractions and heartbeats. This lets them find prey buried in sand or murky water. It's like having a sixth sense!