Fish-eating orcas have been observed communicating to dolphins in a way different from their normal orca dialects.
The transient subtype of orcas eat dolphins and whales though, so I doubt there's much fraternization there. Humpback whales have been observed interrupting orca attacks on other humpback whales and even otber species.
The transient subtype of orcas eat dolphins and whales though, so I doubt there's much fraternization there. Humpback whales have been observed interrupting orca attacks on other humpback whales and even otber species.