Scientific name: Mulloidichthys flavolineatus
Taxonomy: Kingdom Animalia → Phylum Chordata → Subphylum Vertebrata → Infraphylum Gnathostomata → Parvphylum Osteichthyes → Gigaclass Actinopterygii → Class Actinopteri → Subclass Teleostei → Order Mulliformes → Family Mullidae → Genus Mulloidichthys
...also Square-Spot Goatfish
Locations: Hawaii, Indo-Pacific
Group: Marine Life → Fish → Goatfishes
At night, they turn darker, and they fluoresce under UV light.
Juveniles don't have the distinct spot or stripe.