Dolphins do not attack back player

What I was especting to happen :

I punched a dolphin, I thought that it and its friends were gonna fight back.

 

What actually happened :

They stayed passiv and didn't fight, no matter how many times and which way I attacked them (even if I kill one). Occurs in singleplayer and multiplayer

 

Steps to do it :

-Be in survival

-Find a dolphin (or several)

-Hit it, do not one shot it

-Wait for it to fight back. It will not
 
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