My Yellow Tang (Zebrasoma flavescens) and Hawaiian Flame Wrasse (Cirrhilabrus jordani) (male) had a unique interspecies relationship that I have never observed with other fish.
Fish and shrimp, same fish type, yes...but totally different species, no
They were really inseparable.
Never more then 3 - 4 inches apart.
Even during feedings.
Always schooling together around tank.
Tang tearing off pieces of algae strip for flame to eat.
Even to point of sharing same crevice/cave in rock to stay in at night.
Both were "in your face fish" that approached front of tank together whenever you went near it.
Both easy going, mellow natured fish.
Don't have many pics with just one or other as they were always together.
Odd,
Gotta get me another Flame someday. Tang seems lonely since flame loss.
Anyone else observed similar?