20 gallons isn't big enough for that wrasse. Or any of those fish, really.
All of the fish I've named I made sure it would be compadable with a 20 gallon. I found all those fish on saltwaterfish.com and they said 20 gallon or bigger. So is this wrong or? Thanks
I wouldn't use saltwaterfish.com when planning out stocking, they're size minimums are notoriously bad. Example they have a blue hippo tang which can grow to a max of 12" being ok to have in a 40g tank.
Remember, the sizes listed on these sites are sometimes subjective based on the company posting the site. With that being said, LiveAquaria.com typically has the most accurate sizes for fish.