Fish Sonar is a Normal Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Fish Sonar is Unlimited.
YGOPRODeck lists Fish Sonar for these formats: TCG, OCG, Master Duel.
Fish Sonar belongs to the Umi archetype—use that tag when searching for engine pieces and tech options.
A listed print of Fish Sonar appears in Legendary Duelists: Duels From the Deep (LED9-EN020) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Fish Sonar is about $0.02 on Cardmarket (prices change frequently).
