Georgette Douwma / Coral reef scenery with a pair of Red Sea raccoon butterflyfish (Chaetodon fasciatus), Pygmy sweepers (Parapriacanthus guentheri) and soft corals (Dendronephthya sp) Egypt, Red Sea.

Georgette Douwma / Coral reef scenery with Gorgonian and shoal of Pygmy / Glassy sweepers (Parapriacanthus guentheri) Egypt, Red Sea

Georgette Douwma / Shoal of pygmy sweepers (Parapriacanthus ransonetti), Andaman Sea, Thailand

Dan Burton / Glassy sweepers {Parapriacanthus guentheri} on coral reef, Red Sea, Egypt

Chris Newbert / Soft Coral (Dendronephthya sp) schooling Pygmy Sweeper (Parapriacanthus ransonneti) and Lionfish (Pterois volitans)

Chris Newbert / Pygmy Sweeper (Parapriacanthus ransonneti) school in cave, Red Sea, Egypt

Chris Newbert / Soft Coral (Dendronephthya sp) outcroppings, Sea Fan (Subergorgia sp) and Glassfish (Parapriacanthus ransonneti)

Chris Newbert / Pygmy Sweeper (Parapriacanthus ransonneti) in cave

Fred Bavendam / Pygmy Sweeper (Parapriacanthus ransonneti) school, Komodo Island, Indonesia

Pascal Kobeh / A school of Red Sea dwarf sweepers (Parapriacanthus ransonneti) in the Giannis D wreck with a diver in the background, Red Sea, Egypt.

Pascal Kobeh / A school of Yellow sweepers (Parapriacanthus ransonneti) on the reef, Indian Ocean, Maldives.

Georgette Douwma / Kaleidoscopic image of Pygmy sweepers (Parapriacanthus guentheri) and soft corals (Dendronephthia sp.), Egypt, Red Sea.

Georgette Douwma / Kaleidoscopic image of Pygmy sweepers (Parapriacanthus guentheri) with soft corals (Dendronephthia sp.), Egypt, Red sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti). West Papua, Indonesia. Indo-West Pacific.

Linda Pitkin / School of Golden/ Pygmy Sweepers (Parapriacanthus ransonneti), and other fishes, sheltering around a coral head Dampier Strait, Raja Ampat, West Papua, Indonesia.

Linda Pitkin / School of Golden/ Pygmy Sweepers (Parapriacanthus ransonneti), and other fishes, sheltering around a coral head Dampier Strait, Raja Ampat, West Papua, Indonesia, March 2016

David Fleetham / Gorgonian, alconarian coral and schooling Pygmy sweepers (Parapriacanthus ransonneti) Indonesia.

Bertie Gregory / School of Glassfish (Parapriacanthus guentheri) in the cargo hold of the SS Ulysses, Gubal Island, northern Red Sea.

Georgette Douwma / Coral reef with soft corals (Dendronephthya sp.), encrusting sponges and Pygmy sweepers (Parapriacanthus ransonetti) Similan Islands, Andaman Sea, Thailand.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti) surrounding a gorgonian coral, Andaman Sea, Thailand.

Georgette Douwma / Gorgonian sea fan (Melithaea sp.) and Soft corals (Dendronephthya sp.) with a large school of Pygmy sweepers (Parapriacanthus ransonetti) Andaman Sea, Thailand.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti) on reef slope. Andaman Sea, Thailand.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti) with gorgonian corals. Similan Islands, Andaman Sea, Thailand.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti) shoal, Similan Islands, Andaman Sea, Thailand.

Georgette Douwma / Lionfish (Pterois volitans) hunting Pygmy sweepers (Parapriacanthus ransonetti) Similian Islands, Andaman Sea, Thailand.

Georgette Douwma / Gorgonian sea fans (Melithaea sp.) with a large school of Pygmy sweepers (Parapriacanthus ransonetti) Andaman Sea, Thailand.

Georgette Douwma / Gorgonian sea fans with a large school of Pygmy sweepers (Parapriacanthus ransonetti) Similan Islands, Andaman Sea, Thailand.

Georgette Douwma / Gorgonian sea fans (Melithaea sp.) with a large school of Pygmy sweepers (Parapriacanthus ransonetti) Andaman Sea, Thailand.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti) with a Gorgonian sea fan (Melithaea sp.) Similan Islands, Andaman Sea, Thailand.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonetti) with a Gorgonian sea fan (Melithaea sp.) and soft corals (Dendronephthya sp) Similan Islands, Andaman Sea, Thailand.

Georgette Douwma / Coral reef with soft corals (Dendronephthya sp.), encrusting sponges and Pygmy sweepers (Parapriacanthus ransonetti) Similan Islands, Andaman Sea, Thailand.

Pascal Kobeh / Diver taking a picture of a school of Yellow sweepers / Glassfish (Parapriacanthus ransonneti / guentheri) on a coral reef, Mayotte. Indian Ocean. February 2010.

Pascal Kobeh / School of Yellow sweepers / glassfish (Parapriacanthus ransonneti / guentheri) Maldives. Indian Ocean.

Pascal Kobeh / School of Yellow sweepers / Glassfish (Parapriacanthus ransonneti / guentheri) with a diver in the background, Madagascar. Indian Ocean. September 2012.

Pascal Kobeh / School of yellow sweepers / glassfish (Parapriacanthus ransonneti / guentheri) on reef, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / School of Yellow sweepers / Glassfish (Parapriacanthus ransonneti / guentheri) on reef with Lemonfish / Gold-spotted sweetlips (Plectorhinchus flavomaculatus), coast of Dhofar and Hallaniyat islands,...

Pascal Kobeh / School of Yellow sweepers / Glassfish (Parapriacanthus ransonneti / guentheri) on reef with Lemonfish / Gold-spotted sweetlips (Plectorhinchus flavomaculatus), coast of Dhofar and Hallaniyat islands,...

Pascal Kobeh / Crab possibly Horrid crab (Daldorfia horrida) in hard coral, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) Egypt, Red Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) with soft corals (Dendronephthya sp) Egypt, Red Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) Egypt, Red Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) Egypt, Red Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) with soft corals (Dendronephthya sp) Egypt, Red Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) Egypt, Red Sea.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) Egypt, Red Sea.

Georgette Douwma / Coral reef scenery with Pygmy sweepers (Parapriacanthus guentheri) and soft corals (Dendronephthya sp) Egypt, Red Sea.

Georgette Douwma / Coral reef scenery with soft corals (Dendronephthya sp), a Coral hind (Cephalopholus miniata) and Pygmy sweepers (Parapriacanthus guentheri) Egypt, Red Sea.