Ultraman (1966)

S1E14 The Pearl Oyster Protection Directive

A bizarre creature, featuring a frog-like face and a whale's body, is wreaking havoc on pearl farms along Japan's coastline. Efforts to subdue the beast with napalm bombs and electric nets prove ineffective. In a desperate bid to protect the farms, Ultraman arrives to confront the formidable threat and restore peace to the area!