Would really be intresting because 30 species not kept at other public places is quite a number !
Species marked with a star I suspect, but am not certain. Total is 38 if including species with stars, 26 if excluding species with stars. There are a handful of other species (a few Synodontis catfish, a few Malawi cichlids, an African dwarf cichlid, an elephantfish and a Brycon) that also might be unique as I have never seen them elsewhere or heard of public aquariums with them, but for various reasons I am less certain about those and have chosen not to list them below. As I said in my previous comment, a few of the freshwater are present in very low numbers among private aquarists.
Saltwater: Whitespotted bullhead shark (Heterodontus ramalheira).
Freshwater:
-Catfish: Auchenoglanis biscutatus*, Bagrus meridionalis*, Brachyplatystoma capapretum*, Brachyplatystoma rousseauxii*, Hemiodontichthys acipenserinus, Hypostomus latifrons, Hypostomus luteomaculatus, Hypostomus margaritifer*, Hypostomus sp. "Iguazu", Microsynodontis sp. "Nigeria"*, Neosilurus ater*, Otocinclus mimulus, Platynematichthys notatus*, Platysilurus mucosus, Pterosturisoma microps, Rhinelepis strigosa, Spatuloricaria caquetae, Spatuloricaria sp. "Rio Nanay", Tenellus trimaculatus.
-Characiforms: Characidium phoxocephalum, Chrysobrycon yoliae, Hyphessobrycon saizi*, Pseudanos winterbottomi.
-Cypriniforms: Enteromius pellegrini, Labeobarbus acuticeps, Labeobarbus leleupanus, Sewellia monolobata*.
-Cichlids: Apistogramma sp "Rio Abacaxis"*, Chaetobranchus flavescens, Cichlasoma sp. "Rio Curaray", Crenicichla [cf.] lugubris "redface" (I think Tocantins?; should not be confused with the Crenicichla [cf.] lugubris Atabapo in the adjacent aquarium; note that the type locality of lugubris is Rio Negro), Lethrinops altus, Krobia xinguensis, Serranochromis robustus, Taeniolethrinops praeorbitalis.
-Neotropical knifefish: Orthosternarchus tamandua.