First off, the fish in the previous pictures are CLEARLY male and female. When they put the babies in their mouth its for defense. She doesn't know who/what you are and therefor takes you as a threat. She's not eating them. She's moving them. They don't have hands and have to resort to using their mouth to get them from point A to point B. If they are going to eat them, it'll pretty obvious because you would really need to spook them and she can only hold so many in her mouth, so if she keeps putting them in her mouth then they have to be going somewhere..