The Silver Sweeper, Oualan Bullseye, Blackspot Sweeper, Cave Sweeper, Copper Sweeper, Keeled Sweeper, scientifically known as Pempheris oualensis, is a fascinating fish species inhabiting the tropical waters of the Indo-Pacific region. This fish, known for its unique appearance and intriguing behavior, is a popular subject for marine enthusiasts and researchers alike.
Description & Characteristics
Pempheris oualensis is a small to medium-sized fish, reaching a maximum length of 22.0 cm. Its body is laterally compressed, with a distinctive silver to bronze coloration and a prominent black spot on the dorsal fin. The fish’s eyes are relatively large, giving it an alert and inquisitive appearance. This species is known for its keels on the belly, a defining characteristic that contributes to its common name “Keeled Sweeper.”
Habitat and Occurrence
Pempheris oualensis is a demersal fish, meaning it lives primarily on or near the bottom of the ocean floor. This fish thrives in coastal waters, typically found in rocky reefs, coral reefs, and caves. It can be observed at depths ranging from 0.0 to 36.0 meters, frequently venturing into the warm, tropical waters of the Indo-Pacific region. Its presence in this diverse marine zone adds to the richness and complexity of the ecosystem.
Taxonomy
The species Pempheris oualensis belongs to the Class: Teleostei, Order: Acropomatiformes, and Family: Pempheridae. This classification reflects its evolutionary history and shared characteristics with other members of its family, highlighting its place within the broader framework of fish taxonomy.
Feeding
Pempheris oualensis is an opportunistic carnivore, feeding primarily on a variety of crustaceans, including copepods, crabs, mantis shrimps, and rock shrimps. Its diet also includes smaller fish, squid, snails, worms, and zooplankton. This diverse feeding behavior allows Pempheris oualensis to effectively exploit the rich and varied food sources present in its habitat.
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