Currently users can only filter crabs/eggs on the marketplace, but I think it would be useful and advantageous to provide the same features for the user's personal inventory.
Being able to filter our personal inventory by class, adult/egg, purity, etc allows to keep track of our stock and optimize for selling, outfitting scholars, creating teams, etc. One critical filter is to include class for both eggs/adults, as currently that isn't possible in either marketplace or inventory.