I have around 25 of h. gracilis and 20 a. ternetzi; the h. gracilis are a bit fragile and the a. ternetzi are quite durable. I have a small group of fishes sold as l. thayeri. I believe the lack of tail spot makes these thayeri. The gracilis have been pretty solid since they have become established but it is hard to introduce them or new members also the panic easily.What an interesting bunch of species. I bet this combo offers an endless amount of fascination. How many Anostomus ternetzi and Hemiodus gracilis do you have? And is that a Laetacara species at the top? A. fulvipinnis? Really nice, all of 'em.