Yes, the fact that they spawn is not determinative, especially if it turns out they are a color variant of N. rubrocaudatus.
Here's Glaser on the state of affairs and the possible shenanigans going on:
" ...all (80) fish were extremely red, only in some of them the head and the front fifth of...
First of all, I am not convinced they are females of N. sp. 'Rio Amaya.' I've yet to see a definitive report about what the females of all the 'new' super-red Nannostomus species/variants look like. Conspiracy theories abound that exporters are shipping females of N. rubrocaudatus or N...
It is almost certainly not ich and it is most likely scar tissue from fin ray fracture, as others have suggested. Very common in 'fancy' goldfish whose fins are exaggerated. I find it's more noticeable in hyaline (clear) fins such a the dorsal of your young fish.
Especially interesting that a molly species was the subject. They are not front of mind--my mind, anyway--when speaking of shoaling species. Fascinating article.
Actually, you have two Red Cap Orandas, not Lionheads. With long-tailed goldfish such as your Orandas if your water parameters go awry you will see it first affect the caudal fins which will either become ragged or red-streaked when water conditions are compromised.
Regarding your sponge, it...
The '68 edition of Scheel's "Rivulins" was one of a trio of early TFH hardcover books that bowed to science rather than commerce and serious aquarists were the beneficiaries. The other two were Gery's "Characoids of the World" (1977) which was 700 pages crammed with knowledge, and Brittan's...