yesterday my 2 friends went to my house for celebrating something, they my flowerhorn was tolerate the dragonfin fish, they shocking on it because their FH cant be take any tankmate, even a plecco within the they put it in the tank, but the only they didn't try yet is this dragonfin... so to try it we brought my dragonfin to their house to see if their FH kill it, but it not attack it, their very aggressive 8 inches FH never attack it, we did tried it for 6 flowerhorn male and female and none of them make an attack to my dragonfin, so we believed that the dragonfin is a friend species of FH...
guys try it...