Adult yellow-striped leatherjackets have dark bodies, the females are often slightly paler than the male, with bright orange or yellow patch just before the tail and extending along the side of the body. The male also exhibits four brightly coloured spines in this region, they are present on the female and in juveniles, however they are greatly reduced. Juveniles are a brownish colour with irregular spotting covering their body. Adult yellow-striped leatherjackets pair with the same partner for life and generally reside on kelp reefs, as with most leatherjacket species the juveniles inhabit weed and seagrass beds. The maximum length of the yellow-striped leatherjacket is 30 centimetres.
The yellow-striped leatherjacket is one of 22 species occurring in southern Asutralian waters, and are moderately common from Dongara, WA to Broughton, NSW.
Occurrence at the Busselton Jetty:
Adult yellow-striped leatherjackets are occasionally seen from the observatory, and are always observed in pairs with one a little duller in colouration than the other. The male tends to have an orange patch in front of the tail, the female has a bright yellow patch which extends into a yellow stripe along the side of the body. They are most commonly sighted out of the seagrass window.