These fish are tropical, but that doesn’t necessarily mean they prefer saltwater. As an alternative, they are now living in the rivers and ponds scattered throughout Papua New Guinea. These fish are omnivorous and take in rather a different diet. Marbled river stingrays are one of many rarest fish on https://www.tumblr.com/aquariumonlinestore/772853153030963200/what-should-be-your-first-steps-to-set-up-an