I had an ornate bicher that happily chowed down several thumb-size juvie S. eupterus (aka featherfins.) I thought the spines would protect them, but I saw one go down tail-first, squeaking all the way, like it was calling for help. I learned never to trust a bicher with ANY fish small enough to fit into its mouth. Leleupi have the same slender shape as Cyp's, making them easy to swallow. I'd really recommend swapping off the bicher if you want to keep Tang's, most of the fish that will fit in a 90 will fit in the bicher too.