S+ Tier

Mythical TideEndgame AuraThe first true endgame aura. 0.45% drop rate, 5.00x catch luck, 50% reel tension reduction. Multiplies passive aquarium cash.Extinct LeviathanTop AuraThe rarest aura in the game. 0.05% drop rate, 10.00x catch luck, 75% reel tension reduction. Multiplies passive aquarium cash 10x.

S Tier

Oasis SurgeHigh AuraHigh-tier aura that meaningfully changes daily grind pace. 5.00% drop rate, 2.25x catch luck, 30% reel tension reduction.

A Tier

Abyssal EchoMid AuraMid-tier aura that unlocks competitive mutation farming. 14.50% drop rate, 1.50x catch luck, 15% reel tension reduction.

B Tier

BioluminescentEarly AuraFirst real aura tier. 30.00% drop rate, 1.25x catch luck, and 5% reel tension reduction. Cheap fusion recipe makes it a stepping stone to higher tiers.

C Tier

Dull GlowBaselineThe default aura every player starts with. 50.00% drop rate, 1.00x catch luck, 0% reel tension reduction. Functionally a placeholder.