howfishthink
Stage 0 · Fish Vision Camera

Your lure is not the colour you think it is.

Water removes light one wavelength at a time, and the fish looking at your lure does not have your eyes. This model combines both effects: the water column, then the cone set of the species you select.

Green / algal · 3.0m down · 1.5m awayambient 46.7% of surface · eye gain 2×
At the surface your eyes
Down there the fish
—
Detection contrast

Pick a lure to begin.

Lure

Photos stay in your browser. Nothing is uploaded anywhere.

Water

Mesotrophic, algae-dominated. Window shifts to green — the classic bass lake.

Conditions
Eye

Dichromat, green + red. Strong on chartreuse/red separation, weak on blue.

Dichromat views are false-colour. A two-cone eye has no third axis, so its two channels are spread across your three — what you are seeing is which colours the fish can still tell apart, not a photograph of its subjective experience, which nobody can render.The full model, and where it is wrong.

To test more than colour, start with a modelled lure shape and open it inThe Fish. The scenario pages combine the lure build, colour and water conditions in one run.