What is the killer rating of a porpoise?

The term "killer rating" is not commonly associated with porpoises, as they are generally known for their friendly and social behavior rather than aggression. Unlike orcas, which are often referred to as "killer whales," porpoises are small cetaceans that typically do not pose threats to humans. Their behavior is more playful and curious, making them popular among marine enthusiasts. If you meant a different context for "killer rating," please clarify!