Get to know the largest freshwater scaled fish with a face that looks like a topographical map of Mars: the Arapaima. Wait, there's more! Their swim bladder has lung-like tissue and they excrete a milk-like substance from their head. An ichthyologist who works at the Field Museum in conservation science, Dr. Lesley de Souza, takes us to the Amazon and Essequibo basins in South America to learn from the Indigenous communities there and explore the habits of this amazing fish.
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