Captain Planet and the Planeteers (1990)

S6E1 An Eye for an Eye

Hoggish has launched a new commercial fishing venture in the Amazon, but soon realizes that a pod of local river dolphins is significantly cutting into his profits. Determined to resolve this issue, he devises a plan to get rid of them. After being informed by Gaia, the Planeteers swiftly spring into action to ensure that the Amazon rivers are not compromised in the name of progress, fighting to protect the dolphins and their habitat.