Ants and bees are not showing selflessness, they are showing strict hierarchy and chain of command.

Entirely different concept. Not to mention that ants are very, very far from dogs, dolphins and humans. There is no reason to think that a dolphin would have to share their behavior, nor that a human wouldn't share their behavior - do people really choose to be selfless when they dedicate their life to a company, or are they just mindlessly following the march like the ants? There will be the occasional ant that doesn't do as told, leaving the question of where there are more humans or ants breaking showing independence and breaking out of rank.

For reference, there exist many types of ants that have abandoned the normal ways of ant colonies.

> I didn't say it would reply with words.

It would be even more impressive if it managed to communicate without words - Telepathy is not exactly expected in dogs.