Cephaloscyllium fasciatum
CRCritically Endangered

Cephaloscyllium fasciatum

Cephaloscyllium fasciatum, commonly known as the reticulated swellshark, is a small benthic shark species endemic to the coastal waters of southeastern Australia. This distinctive shark is characterized by its ability to inflate its body when threatened and its reticulated pattern of dark bands and spots across a lighter background.

Decreasing

Population trend

5

Countries

Photo: (c) 邵廣昭, einige Rechte vorbehalten (CC BY-NC)

01Classification

Taxonomy & Classification

Kingdom

ANIMALIA

Phylum

CHORDATA

Class

CHONDRICHTHYES

Order

CARCHARHINIFORMES

Family

SCYLIORHINIDAE

Genus

Cephaloscyllium

Cephaloscyllium fasciatum belongs to the family SCYLIORHINIDAE, order CARCHARHINIFORMES, within the CHONDRICHTHYES class.

02Description

Species Profile

Cephaloscyllium fasciatum, commonly known as the reticulated swellshark, is a small benthic shark species endemic to the coastal waters of southeastern Australia. This distinctive shark is characterized by its ability to inflate its body when threatened and its reticulated pattern of dark bands and spots across a lighter background. The species inhabits rocky reefs, kelp forests, and sandy bottoms in temperate waters, typically found at depths ranging from shallow intertidal zones to approximately 200 meters. Reticulated swellsharks are nocturnal predators that feed primarily on small fish, crustaceans, and cephalopods. Their reproductive strategy involves laying leathery egg cases that attach to rocky substrates or vegetation. The species faces significant conservation challenges due to its limited geographic range and specific habitat requirements. Primary threats include coastal development, pollution, fishing pressure, and habitat degradation from human activities. Climate change poses additional risks through ocean warming and acidification, which can affect prey availability and habitat quality. The species' slow reproductive rate and site fidelity make populations particularly vulnerable to local extinctions. Conservation efforts focus on marine protected area establishment, fishing regulation enforcement, and habitat restoration programs. Research initiatives aim to better understand population dynamics, reproductive ecology, and critical habitat requirements to inform targeted conservation strategies for this critically endangered shark species.

The reticulated swellshark faces threats from coastal development, fishing pressure, and habitat degradation in its limited range along southeastern Australia. Pollution and climate change impacts, including ocean warming and acidification, further compromise the species' rocky reef and kelp forest habitats. The shark's slow reproductive rate and restricted distribution make populations particularly vulnerable to these cumulative pressures.

Key Facts

IUCN StatusCritically Endangered (CR)
TrendDecreasing
GroupFishes
03Habitat

Habitat & Distribution

Cephaloscyllium fasciatum inhabits rocky reefs, kelp forests, and sandy bottoms in temperate coastal waters of southeastern Australia. The species occurs from shallow intertidal zones to depths of approximately 200 meters, showing preference for areas with complex bottom structure that provide shelter and foraging opportunities.

MARINEMajor
04Threats

Threats

!

IUCN Red List: Critically Endangered

The reticulated swellshark faces threats from coastal development, fishing pressure, and habitat degradation in its limited range along southeastern Australia. Pollution and climate change impacts, including ocean warming and acidification, further compromise the species' rocky reef and kelp forest habitats. The shark's slow reproductive rate and restricted distribution make populations particularly vulnerable to these cumulative pressures.

Fishing & harvesting aquatic resources

Ongoing

Invasive non-native/alien species/diseases

Ongoing

Logging & wood harvesting

Ongoing

Marine & freshwater aquaculture

Ongoing

Other ecosystem modifications

Ongoing
06Range

Found in 5 Countries

Community

Community Sightings

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07Sources

Sources & Attribution

How to Cite

IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS

GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org

This page: SpeciesRadar (2025). Cephaloscyllium fasciatum (Cephaloscyllium fasciatum). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/reticulated-swellshark

Full citation guide & data usage terms