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Card 201 of 9932026-09-21 issue

Observed arrival · 2026-09-21

DANIO: A 650,000-Neuron Fish-Brain Workbench

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An interactive simulation and downloadable computational model of the adult Danionella cerebrum, with a Python interface for sensory inputs and motor outputs.

Landing page captured for the 2026-09-21 issue.
For
Computational neuroscience and robotics experimenters
Worth noticing
The package includes 1,023 inter-regional macro-tracts and six listed neurotransmitter phenotypes.

Field notes

The model is presented as a compressed NumPy archive with atlas regions, volume-constrained neuron coordinates, neurotransmitter labels, and 1,023 macro-tracts. Its example workflow feeds luminance, prey angle, water velocity, and acoustic frequency into a Python object, then reads tail thrust, yaw, and drumming output. The browser surface adds a 60 FPS simulation viewport, selectable anatomical regions, and separate full-CNS and cranial-connectome modes.

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ProPolished or operationally mature
NicheUnusually specific use

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