The bare-hearted glass frog (Hyalinobatrachium colymbiphyllum) has the most transparent underside of all glass frogs, which allows for almost full visibility of their internal organs. – WTF Fun Facts
Source: https://en.wikipedia.org/wiki/Hyalinobatrachium_colymbiphyllum
I would have much preferred to view one of these living glass frogs instead of disecting the chlorophyll ladden frogs of biology class.
I’m thinking the frogs would be happier too.