User blog comment:NightwingOfTheFuture/Young Justice Returns this Week!/@comment-5008987-20120925050607/@comment-1038387-20120925094047

AquaMAN 's baby. But yeah, Aquababy dying is part of the character, just as much as being White Martian is for Miss M or half-Kryptonian for Superboy. He's got little character beyond the occasional baby noise.

But if he were still alive, Arthur Jr. would be 5.