Narrowstripe Cardinalfish

Pristiapogon exostigma, also known as Eyeshadow cardinalfish or oneline cardinalfish, is a small pale ray-finned fish from the family Apogonidae, the cardinalfishes with light-ended black stripe ending in black spot above centre of stripe. It has an Indo-Pacific range which extends from the Red Sea to the Line Islands and Mangareva Islands and south to northern Australia and north to the Ryukyu Islands.

Adapted from Wikipedia, licensed under CC BY-SA 4.0.