The deep ocean is the last frontier on our planet. It is home to creatures beyond our imagination and filled to the brim with life. Coastal communities have known the value of a healthy ocean for centuries, yet much of its life remains unknown, sitting beyond the reach of most research programs due to the hostility of its depth and vastness. With current research and monitoring activities in the region mostly focussing on shallow reefs, our Field Identification Guide, published in the peer-reviewed, open-access Biodiversity Data Journal, aims to showcase the benthic organisms that inhabit the Seychelles’ deeper reefscapes. The research cruise that gathered the imagery data used to create the guide, Nekton’s “First Descent: Seychelles Expedition”, was the first of its kind to systematically survey deeper reefs in Seychelles waters, bringing to light previously little-known ecosystems and their inhabitants.