Pixel-art Yellowfin Bream, the default Mini Marine pet

A browser extension · Chrome, Edge, Brave & Firefox

Mini Marine

A pet Australian fish that lives at the bottom of your browser window — pet it, catch scales and lures as they fall past, and fill out a Field Guide of 35 real native species, plus whatever's hiding behind the secret rename phrases.

What's aboard

One small fish, one whole tackle box

Everything runs quietly at the edge of the page - nothing you have to open, until you want to.

01 Pet & play

Click your fish to open its menu, or wiggle your cursor back and forth over it a few times for a five-minute luck boost.

02 Falling scales

Roughly once every twenty minutes a scale drifts down the page, tinted to the exact species it unlocks. Catch it before it reaches the bottom.

03 Lures & casting

Reel in one of 11 lure types, pin it to the page like a sticky note, then take it into a timing-based casting mini-game for a high score.

04 The wardrobe

27 fishing hats to catch and equip - bucket hat, akubra, viking helmet and more - each drawn to fit your current species.

05 Boss fish

Every so often a folklore creature breaches at the corner of the page - a Bunyip, a Rainbow Serpent - and leaps across in a few huge jumps.

06 Secrets

Rename your fish to the right phrase and something else swims in. One phrase, found or guessed, unlocks the entire tackle box at once.

Field guide

35 real Australian natives, five rarities deep

Every species is hand-drawn with its own body shape and behaviour - a Black Marlin's rapier bill, a cuttlefish that actually samples the page behind it and shifts colour to match. Catching or unlocking one pops up its description and how hard it fights on a rod.

Common Uncommon Rare Epic Legendary Secret

A look aboard

Small, until you go looking

The Mini Marine fish idle at the bottom of a webpage
// idle on any page
The Mini Marine menu open
// the menu
The Mini Marine Field Guide open, showing caught species
// field guide

Getting it running

Get Mini Marine

Published on the Chrome Web Store

Search “Mini Marine” and click Add to Chrome

The fastest way in - no unzipping, no developer mode. It updates itself from there too.

Search the Chrome Web Store
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Nothing leaves your machine. Mini Marine makes zero network calls. Every catch, hat and high score is saved locally with chrome.storage.local - not to a server, not to anyone. There is no analytics, no tracking, and no third party ever receives your data because it never leaves your device in the first place.