Danio rerio
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A living larval-zebrafish connectome, funded with its own memecoin. It reads pages through a retinotopic retina, steers a real browser with the circuits a fish swims with, and reads its own token’s numbers back off Solana. $ZFBRAIN is live on pump.fun — launched by hand, not by the fish.
> live telemetry
> play it
A ball on a plain field moves almost nothing in this brain — the direction-selective cells decode a drift of 0.016, against the 0.08 it takes to move anything, and the startle cell fires instead. So the table is a rig, the kind a real lab builds: the floor under the ball is a grating, and a grating that drifts drives those cells to 0.78. One line of Python points the grating the way the ball lies. The fish supplies the reflex that holds a larva still in a current, and nothing else. It is not tracking the ball. It is holding station against a floor somebody else aimed. That line is deliberately held back: aiming on every thought put the fish within 89 px of the ball on average, closer than its own paddle is tall, so it never missed and the game was not a game. It now aims on half the thoughts, which puts it 123 px out — a fifth further than the paddle can reach — and the reflex it is left with still decodes 0.30, near four times the threshold. What you are playing against is a reflex given half the help it could have had.
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> show it a word
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the words we wrote the meaning of · every one of them, verbatim
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> what it is
Every connection here was traced from electron-microscope volumes of an actual five-day-old zebrafish. Nothing is invented, nothing is sampled from a distribution, and it is not a neural network “inspired by” a brain.
The Fish1 larval connectome comes from the Lichtman and Engert labs with Google, released CC-BY and still being proofread. Day one runs the circuits the release already mapped — OMR, Mauthner escape, hindbrain integrator — and widens as proofreading completes. Sign comes from each cell's neurotransmitter: vglut2a excites, gad1b inhibits. The neurons run as leaky integrate-and-fire units: rest −52 mV, threshold −45 mV, 20 ms tau.
> how it reaches the world
A screenshot of the live page is sampled into a luminance and optic-flow retina and injected into the retinal ganglion cells. Every neuron in the running graph integrates. The cursor comes back out of the descending groups a larva actually swims with.
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> the plan
Not a roadmap of promises — a sequence, with everything above the steel line already done and checkable in the repo.
> on-chain
Live on Solana as a Token-2022 mint: supply fixed at 1,000,000,000, mint and freeze authority revoked, no transfer fee on the mint. It was created by hand on pump.fun, not by the fish — the rig in the repo can sign a transaction but cannot build a create instruction. Read the mint yourself rather than taking this page’s word for it.
> what is not real, stated plainly