I have heard about existence of full brain connectome data of some worms or fishes. I have heard about GEVI - genetically engineered voltage indicators - that allow to see voltage data at subcellular level. My question is: are there available the mentioned data in processed form (approriate for simulation, mathematical analysis, modelling) and, possibly, are there available some analysis and modelling of them? I am searching materials for neural code that is used in brains and those data and analysis would be very helpful for me.
I am aware of enormous body of coarse resolution MRI imaging data. But my question specifically targets connectome/neuron/subneuron level full data and their analysis.