A zebrafish is a tropical freshwater fish in the minnow family. These to odd looking creatures are 2 day old zebra fish larvae. Picture Credit: Jurgen Berger and Mahendra Sonawane, both employees at the Max Planck Institute for Developmental Biology.
Pictured: The moment a human egg emerged from its ovary
Those weird black rubbery case-like things you find on the beach - mermaids' purses - are actually egg sacks for skates, rays, and certain species of sharks. So, if you picked one up. you've held a baby shark.
I'm kind of amazed that this was done with papier-mache. I can't imagine what it could be for in terms of display, but I would put it on the coffee table as a conversation starter. Papier Mache gynecological model after Dr Louis Auzoux c 1880