Atelomycteridae is a family of small, benthic sharks within the order Carcharhiniformes (ground‑sharks). Members of this family are commonly referred to as catsharks due to their elongated bodies, blunt heads, and cat‑like eyes. The family is recognized by the following taxonomic hierarchy:
- Kingdom: Animalia
- Phylum: Chordata
- Class: Chondrichthyes (cartilaginous fishes)
- Subclass: Elasmobranchii (sharks and rays)
- Order: Carcharhiniformes
- Family: Atelomycteridae Koh, 1996
Genera and Species
Atelomycteridae comprises two genera that are widely accepted in scientific literature:
- Atelomycterus – often called coral catsharks. This genus includes several described species, such as Atelomycterus marmoratus (coral catshark) and Atelomycterus fasciatus (banded catshark).
- Parmaturus – a genus of deep‑water catsharks, containing species such as Parmaturus xaniurus (spiny catshark).
Overall, the family contains fewer than 15 recognized species.
Morphology
- Size: Typically small, ranging from 30 cm to 70 cm in total length.
- Body shape: Elongated and slender with a slightly flattened underside, facilitating life on or near the seabed.
- Dentition: Small, narrow teeth suited for grasping soft prey.
- Fins: Two dorsal fins of roughly equal size, a large anal fin, and a heterocercal caudal fin.
- Coloration: Variable; many species display mottled or banded patterns that provide camouflage among coral and rocky substrates.
Distribution and Habitat
Species of Atelomycteridae are primarily distributed throughout the Indo‑Pacific region, including coastal waters of:
- The Red Sea and western Indian Ocean
- Southeast Asian seas (e.g., the Philippines, Indonesia, Malaysia)
- Northern Australia and surrounding islands
Habitat preferences range from shallow coral reefs and rocky lagoons (e.g., Atelomycterus spp.) to deeper continental slope environments (e.g., Parmaturus spp.).
Ecology and Behavior
- Diet: Predominantly nocturnal hunters feeding on small bony fishes, crustaceans, and cephalopods.
- Reproduction: Oviparous; females lay encapsulated eggs (commonly called “mermaid’s purses”) that are attached to substrates such as seaweed or coral.
- Activity: Mostly nocturnal; many species rest concealed within crevices or under ledges during daylight hours.
Conservation Status
Most Atelomycteridae species have not been evaluated in detail by the International Union for Conservation of Nature (IUCN). Where assessments exist, many species are listed as Least Concern owing to their relatively wide distribution and lack of targeted fisheries. However, bycatch in trawl and gill‑net fisheries, as well as habitat degradation (e.g., coral reef loss), may pose localized threats.
Research Notes
- Taxonomic studies employing molecular phylogenetics have refined the delineation of Atelomycteridae from closely related catshark families (e.g., Scyliorhinidae).
- Ongoing research focuses on species' reproductive biology, population structure, and responses to environmental change.
All statements are based on peer‑reviewed taxonomic and ecological literature available up to 2024.
