Numerical discrimination in Danionella.

ABSTRACT: The transparent teleost Danionella cerebrum offers unique advantages for neuroscience research, including small size, lifelong cranial transparency, and a simplified brain. Despite its suitability for imaging and neural circuit studies, its cognitive abilities remain largely unexplored. Here, we show that Danionella can discriminate between quantities. Using a habituation/dishabituation paradigm over six trials across five days, fish were exposed to dot arrays of constant numerosity (e.g., 3 dots), while geometric visual properties were systematically varied to ensure responses were driven by actual numerical information. In the final trial, a different numerosity (e.g., 9 dots) was presented. Fish showed significant dishabituation, spending more time near the numerically alt

SUBMITTER: Zanon M 

PROVIDER: S-EPMC12552912 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature