I've had a yellow wrasse for about a week now, and decided to purchase another. This time, I bought a green wrasse. I thought they would get along, since coming from the same genus.....wrong!. The yellow wrasse wants to kill the green one. I got very lucky, and captured the green wrasse, and placed him in a ~2g "critter cage"; with the "acclimation cage" inside the display tank. Is there any wrasses that will get along with the yellow wrasse? What groups (eg genus species) will coexist together without aggression?, or am I to believe this is another "trial & error" gamble. I forgot to mention the tank mates, which include: (6) blue-green chromis', (1) lawnmower blenny, and (1) purple dottyback. I might add that there's not any aggression with tank mates. Thanks in advance for your comments, I appreciate your time.