dragon goby

Dragon Gobys are a brackwater fish.
While I'm sure you could acclimate him to reef salnity.
Im not sure if it whould be the best idea.
 
There is a dragon goby, but it is very low salinity, a harbor fish, brackish water: it eats brine shrimp, and is about a foot long.

If you mean diamond goby, they are sand sifters and diggers.

If you mean dragonette, mistakenly called such names as mandarin goby or scooter blenny, there are two notable types, the mandarin dragonette, and the scooter dragonette. Both eat isopods. My mandarin eats 60.00 a month worth of isopods, though my tank is beginning to keep up with her demand on its own. The scooter 'blenny' dragonette is a little more willing to eat other food than pods. A mandarin's exclusivity in that department is the reason why many fail and die. Well fed, they are ich resistent, disease resistent, and generally are a personable, peaceful fish. The only trouble they tend to get into is invading some cranky fish's territory, completely oblivious to the other fish's threat displays or even fin-nips.
Do not keep a dragonette with a 6-line wrasse: the wrasse will kill them immediately.
 
<a href=showthread.php?s=&postid=7404818#post7404818 target=_blank>Originally posted</a> by Sk8r

Do not keep a dragonette with a 6-line wrasse: the wrasse will kill them immediately.

You are pretty knowledgeable however why would you say this
 
Anecdotal only. Wrasses have killed mandarins in a sufficient number of complaints in this forum about that particular varietal combination that I'm not going to risk it, personally. ;) If you have that combination successfully, do state which was there first in the tank, and how big the tank is, because if one is going by anecdotal accounts, a variety of experiences helps. The accounts I have read say it was a bad combination from the first sight in moderate-sized tanks. Mandarins tend to be completely oblivious about territories, and wrasses perhaps aren't inclined to forgive trespass, no idea on that one.

Sleeper gobies...now that's a different kettle of, well, fish. Peaceful, max length about 7 inches, minimum tank a 55 gallon, though I'd say he might like more room. The sleepers MIGHT object to a watchman---similar habits sometimes breed rivalries---but otherwise should be a quiet fellow.
 
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