Oh, you mean the one where the Navy rounded up all the residents back in the Twenties after sending torpedoes down into the abyss just past Devil Reef? Not much of a town there anymore.

"There were vague statements about disease and concentration camps, and later about dispersal in various naval and military prisons, but nothing positive ever developed. Innsmouth itself was left almost depopulated, and it is even now only beginning to show signs of a sluggishly revived existence."

I'm guessing the character might have used surviving stock from those camps in her experiments. Wonder if Aquaman knows about the history there.