Albert CardonaEmre Yaksi's lab found the fish thalamus and its sensory relays to the fish cortex, aka the pallium:
"Hierarchical processing of sensory information across topographically organized thalamocortical-like circuits in the zebrafish brain", Trinh et al. 2025
https://www.biorxiv.org/content/10.1101/2025.09.15.675867v2