Diademichthys lineatus

Long-snout clingfish | Sea Urchin Clingfish | Striped Clingfish | Urchin Clingfish
Diademichthys lineatus
Diademichthys lineatus, Photo: Rick Stuart-Smith
Diademichthys lineatus
Diademichthys lineatus, Arafura Sea, Australia, Photo: Ian Shaw
Diademichthys lineatus
Diademichthys lineatus, WA, Australia, Photo: Rick Stuart-Smith
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Diademichthys lineatus
Diademichthys lineatus
Diademichthys lineatus


Tropical Indo-Pacific


Thin flexible dark red body, two thin pale stripes from snout to tail, yellow and black patches on tail. Unusual amongst clingfishes in mostly swimming rather than sitting, sheltering amongst Diadema sea urchin spines.


Max Size: 5 cm

Sea Temperature Range: 17.3-31.3°C

Depth: 3-20 m

Habitat Generalization Index: 12.64

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Infrequent (8.7% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Few (2 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: Joe Shields