Games like Aquanima
Games like Aquanima include Slime Rancher 2, Spirit City: Lofi Sessions, Chillquarium, Loddlenaut, and Cast n Chill. We matched them by the tags players give Aquanima on Steam (Creature Collector, Incremental, Idler, Cozy, and Underwater): closest matches first, and among equally close ones the better-known games.
Slime Rancher 2
Shared: Creature Collector · Relaxing · Cute
Spirit City: Lofi Sessions
Shared: Cozy · Creature Collector · Idler
Chillquarium
Shared: Creature Collector · Idler · Incremental
Loddlenaut
Shared: Underwater · Relaxing · Creature Collector
Cast n Chill
Shared: Idler · Creature Collector · Cozy
Tiny Pasture
Shared: Idler · Incremental · Creature Collector
Keep on Mining!
Shared: Incremental · Idler · Relaxing
Creature Kitchen
Shared: Creature Collector · Cozy · Relaxing
Berry Bury Berry
Shared: Incremental · 3D · Creature Collector
Leaf Blower Revolution - Idle Game
Shared: Incremental · Idler · Casual
ABZU
Shared: Underwater · Relaxing · Atmospheric
Ropuka's Idle Island
Shared: Idler · Cozy · Relaxing
Shelldiver
Shared: Incremental · Idler · Relaxing
Bongo Cat
Shared: Idler · Incremental · Cute
Kabuto Park
Shared: Creature Collector · Cozy · Casual
Cookie Clicker
Shared: Incremental · Idler · Casual
Chill with You : Lo-Fi Story
Shared: Relaxing · Idler · Atmospheric
Bills Must Be Paid
Shared: Incremental · Idler · Relaxing
Joyquarium
Shared: Creature Collector · Idler · Incremental
Leaf it Alone
Shared: Incremental · Relaxing · Cozy
Is This Seat Taken?
Shared: Cozy · Relaxing · Casual
Digseum
Shared: Incremental · Idler · Relaxing
Insaniquarium Deluxe
Shared: Incremental · Underwater · Casual
LEGO® Builder's Journey
Shared: Relaxing · Cozy · Cute