Assistants from Amazonian aquatic mammals project capture an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Brazilian researcher, Vera M.F. Da Silva from INPA (National Institute of Amazonian Research), measures an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Brazilian biologist Diogo Alexandre de Souza from Amazonian aquatic mammals project holds a baby of Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

An assistant from Amazonian aquatic mammals project marks a baby of Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Assistants from Amazonian aquatic mammals project capture an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

A Tucuxi dolphin is pictured at the Mamiraua Sustainable Development Reserve in Uarini, Amazonas state, Brazil January 19, 2020.

Brazilian researcher, Vera M.F. Da Silva from INPA (National Institute of Amazonian Research), and her assistants carry an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Assistants from Amazonian aquatic mammals project capture an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

An assistant from Amazonian aquatic mammals project takes a picture of an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Assistants from Amazonian aquatic mammals project capture an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

An Amazon River Dolphin also known as Pink Dolphin is pictured at the Mamiraua Sustainable Development Reserve in Uarini, Amazonas state, Brazil January 18, 2020.

Fishermen contracted by Amazonian aquatic mammals project, search for Amazon River Dolphins also known as Pink Dolphins at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 18, 2020.

Brazilian researcher, Vera M.F. Da Silva from INPA (National Institute of Amazonian Research), takes out milk of an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Brazilian researcher, Vera M.F. Da Silva from INPA (National Institute of Amazonian Research), measures an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

A Tucuxi dolphin is pictured at the Mamiraua Sustainable Development Reserve in Uarini, Amazonas state, Brazil January 19, 2020.

Veterinarian Rodrigo de Souza Amaral from Amazonian aquatic mammals project, examines a baby of Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Brazilian researcher, Vera M.F. Da Silva from INPA (National Institute of Amazonian Research), examines an Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

An assistant from Amazonian aquatic mammals project holds a baby of Amazon River Dolphin also known as Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.

Scholarship student Cristiana Vasconcelos from Amazonian aquatic mammals project takes notes as they examine an Amazon River Dolphin or Pink Dolphin at the Mamiraua reserve in Uarini, Amazonas state, Brazil January 20, 2020.