Fins & Fronds

Scape, stock and care for every real kind of aquarium, from Iwagumi stone gardens to Malawi rockwork and reefs, and grow a little fish shop into a grand oceanarium.

You get the keys to an empty fish shop. Set up tanks, landscape them with sand, stone, driftwood and plants, and stock them with fish, shrimp, snails and corals. Keep the water right: the game tracks real water chemistry, from the nitrogen cycle to pH, hardness and salinity.

Build a real kind of tank and the game recognizes it, from a community tank to Rio Negro blackwater or a Lake Malawi rock shore, then rates it on wellbeing, habitat, scape, authenticity and spectacle. Visitors pay to see it, though you never see them, only their nose prints on the glass.

Breed stock to sell, answer letters, and send expeditions to 27 regions for new species. Grow from a Little Fish Shop to a Grand Oceanarium with reefs, kelp towers, jellyfish and big sharks. Press V to watch any tank full screen.

Screenshots

Devlog

Oct 21, 2026

New: Fins & Fronds, a cozy aquarium tycoon

Scape, stock and care for every real kind of aquarium, and grow a little fish shop into a grand oceanarium. Free in your browser.