Nilus massajae keeping a watchful eye on an Argus Reed Frog (Hyperolius argus)

Species in the Nilus genus, also called fish-eating spiders, are found at fresh water sources where they feed on tadpoles, adult frogs and aquatic invertebrates.

Photographed in St. Lucia, iSimangaliso Wetland Park, KwaZulu-Natal, South Africa, January 2019