Black ghost knifefish

Species of fish

The black ghost knifefish (Apteronotus albifrons) is a tropical ornamental fish belonging to the ghost knifefish family (Apteronotidae). They originate in freshwater habitats in South America where they range from Venezuela to the Paraguay–Paraná River, including the Amazon Basin. They are popular in aquaria.

From Wikipedia, under CC BY-SA. More on occurri.