I know, beauty is in the eye of the beholder, and so is ugly. But what's your favourite ugly (to you) aquarium fish? Deep sea blob fish don't count.
For me, it has been the Mangrove killifish, Kryptolebias marmoratus. It has all the beauty of something that fell off a decaying potato, but it is fascinating because it's a self fertilizing hermaphrodite. I can easily see why people keep them, but I can also easily say it ain't for their beauty.
I also suspect they may have reacted to not needing partners to breed with by really letting themselves go.
For me, it has been the Mangrove killifish, Kryptolebias marmoratus. It has all the beauty of something that fell off a decaying potato, but it is fascinating because it's a self fertilizing hermaphrodite. I can easily see why people keep them, but I can also easily say it ain't for their beauty.
I also suspect they may have reacted to not needing partners to breed with by really letting themselves go.