Onefin skate
The onefin skate (Gurgesiella dorsalifera) is a species of fish in the family Gurgesiellidae. It is endemic to Brazil. Its natural habitat is open seas, specifically on the bottom along the continental slope between  deep. It is a bycatch of fishing boats targeting shrimp and Argentine squid (Illex argentinus), which has contributed to significant population declines among G. dorsalifera. Sources 

onefin skate
Endemic fauna of Brazil
Fish of Brazil
onefin skate
Taxonomy articles created by Polbot