The young Devouring Abyss, if lucky enough to have sufficient material to devour and form a strong enough devouring core, and isn't killed, has the potential to grow into an adult Abyssal Big Mouth.
Unfortunately...
"We have encountered quite a few such Little Black Balls, but they disappear quickly, seemingly killed by someone," Grelli explained.
Finic and Grelli both have experience living in the Silent Death Sea, which is why Anthony asked her to share her understanding of young Big Mouths.
"Quite a few? We've never seen them elsewhere. Could it be that they are a specialty here?" Negris remarked in surprise.
"It's possible. Don't forget this is the ruin of the Devouring Abyss Tirade, just like the Dragon Clan's graveyard more easily nurtures Dragon Souls, this place is likely to nurture the young of the Devouring Abyss more easily," Anthony said.
