Possibly Macrodontogobius wilburi 3-4 cm long with isopod parasite, Anilocra sp. 1; at Big Vicki's Reef, Lizard Island.
This individual was near the larger individual photographed on the same dive (and is in the same LIFG record). The larger specimen was identified by Doug Hoese as Macrodontogobius wilburi and this appears to be the same species.
© Anne Hoggett