澳洲肺鱼 / Australian lungfish

I breathe air with a lung—your closest living fish relatives have more than gills in their toolkit!
我用肺呼吸空气——你最近的现生鱼类亲戚，工具箱里可不只有鳃！

Sources
Giant lungfish genome elucidates the conquest of land by vertebrates
https://www.nature.com/articles/s41586-021-03198-8
Sarcopterygian fin ontogeny elucidates the origin of hands with digits.
https://doi.org/10.1126/sciadv.abc3510
Nuclear protein-coding genes support lungfish and not the coelacanth as the closest living relatives of land vertebrates.
https://doi.org/10.1073/pnas.0400609101
Species reference
https://en.wikipedia.org/wiki/Australian_lungfish

Research context
Australian lungfish reveal developmental and genomic connections between fish fins and tetrapod limbs. Lungfishes are the closest living fish relatives of tetrapods and offer a crucial comparison for air breathing.