Gaav laughs, "Since it doesn't suit you, you'd think it made for a good insult?"
"Dolphin is one of the five, she's largely forgetful when it suits her but governs the oceans. Meant by Her, the Creator of all of this."
The gist is that Gaav messes with Snape. :D Really. I think he knows the value of the house rivalry when it becomes relevant in battles but doesn't think children make for good war heroes despite what most people in the HP books think, but they have purpose once they are involved in a war or in starting one.