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Western Indian Ocean, eastern South Africa near Durban north to southern Mozambique.

Honeycomb Izak Catshark

Holohalaelurus favus

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Broad-headed catshark with irregular dark reticulations and spots creating a honeycomb pattern; labial grooves absent. Marine upper to middle continental slope, approximately 200–1,000 m.

Aquarium suitability

Wildlife education

This record supports wildlife education. Aquarium-care questions are not assigned to this profile.

Wildlife education profile; reviewed natural-history sources do not establish a captive operating protocol.

Wildlife reference; no home-aquarium stocking recommendation or validated captive operating protocol is supplied. Public-aquarium photographs document living animals, not suitability for private keeping.

Outstanding care evidence

  • Institutional lifetime husbandry and veterinary protocol

Identification

Broad-headed catshark with irregular dark reticulations and spots creating a honeycomb pattern; labial grooves absent.

Names and Classification

Accepted species described in 2006 after separation from the broader H. regani concept; historical Natal izak records need review.

Adult Size

Known to approximately 51.5 cm total length; maturity distribution and typical adult size poorly established.

Distribution and Habitat

Western Indian Ocean, eastern South Africa near Durban north to southern Mozambique. Marine upper to middle continental slope, approximately 200–1,000 m.

Feeding and Ecological Role

Species-specific diet is poorly documented. Deepwater fishing exposure contributes to suspected declines despite potential refuge at depth.

Reproduction and Life History

Reproductive parameters remain inadequately known; no annual egg output inferred from congeners.

Conservation

Endangered (IUCN global; Assessed 1 August 2019; published 2020). Global IUCN category; national listings are separate. Sparse or old records do not establish extinction. Taxonomic revisions limit transfer of older biological data.

Responsible Observation

Observe without chasing, feeding, touching or obstructing the animal. Keep fins and equipment off resting rays and sharks; give sawfishes and wedgefishes room to move. Follow the site’s local wildlife rules and use responsible dive operators.

About the Photographs

No freely reusable photograph of a verified living specimen was found in this search. The target of at least three photographs remains unmet. Dead or preserved specimens, drawings and uncertain identifications were excluded.

Aquarium Suitability

Wildlife education only. This marine elasmobranch is outside home-aquarium stocking and care guidance. Wild range and diet are not a captive operating protocol; this profile does not infer tank dimensions, water settings, acquisition advice or an institutional welfare plan.

Evidence Gaps

Evidence gaps include: Age, reproductive rates, diet, abundance and magnitude of decline remain uncertain.

A living record

Natural history, taxonomy and global conservation categories checked against the linked sources. Habitat measurements are not captive care settings. Each photograph has separate identity, living-status and rights evidence. Public content last reviewed October 17, 2026.

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