The Orange-Lined Triggerfish is a common coral reef fish that appears in both of the games. It is known as the Undulate Triggerfish in the first game.
"This fish has a beautiful, distinctive coloration--green with orange lines. It is very timid and tends to hide in crevices if approached or exposed to light. It raises its large dorsal fin and wedges its body inside the crevice, making exit difficult. If it does this, there's nothing to do but wait for it to come out again."
These can be found all throughout the Manoa Lai Sea during the winter.
These can be found in the Zahhab Region, around the C-4 coordinate area.