Mandarin and Scooter Dragonets
If You Bought a Starved Scooter
If the first of my scooters was bought with concave belly, but otherwise in a good shape, full bodied.
The second one was a trial to make a good company for the first, based on incorrect assumption that the fish shouldn't be kept alone. It was from the same tank, where the first scooter was in the store, no aggressiveness was noted, so the chances of compatibility were pretty high.
Only it was not a good idea to wait 2 weeks, before buying her. Now she looked starved.
Unfortunately, in my experience with four dragonets, the fish is better to keep alone, than with harassers, and the worst of them - of their own kind. The first scooter attacked the the second almost all the time, just like mandarin did that to eachother. It was not good.
The second scooter also weaned early and was already eating the frozen food.
The 6th day, the moment after attack. My camera is not fast enough for them.
See the wound on the back and the right eye. She can't see by the injured eye, may be the hint of light or dark only.
In two weeks more, I had to classify her as a goner.
In ten more days, having nothing to lose and caring more about the fish condition, than about accusations in cruelty of keeping fish in a really small tanks (another option was returning fish to the store. But returning the half-dead and permanently injured fish to LFS would be a death sentense for it), moved her to the only available place - 5g hexagonal tank with Christmas tree rock and no other fish, but with live mysid copepods and the live rock, full of growth. Note the nook at the front glass - the place of feeding - for comparing the size of the fish and the tank. 
In a matter of hours, she turned from a desperate half-dead creature to a confident fish with a proudly erected dorsal fin.
The mysis was just placed near the front glass. Later, she become accustomed to come to the feeding place at the sight of keeper, coming to the tank.
In 3 weeks she looked much better. Wound on the back was healing, and fish gained some body mass.
She was there for a month, but with the water quality that left something to be desired, and no space at all for swimming, some climbing only. So the hex was joined with the next to it 10g tank, in one 20gal long tank: 
It was really nice, until the death of the blue sponge and following chain of death of the sea slugs and, later, eviscerated sea cucumber. All fish, except the weakest, was lost, including the young mandarin. Scooter not too much affected. Very localized influence?
What was alive, was returned to 10g tank again.
One month after nuke. At last became full bodied. It took 3.5 months of the peaceful life.
The same is now, August 2007, the one eyed dragonet returned in 90g tank after downsizing (reducing the number of tanks). The other scooter and mandarin, both healthy, were returned to LFS, where, as weaned to the frozen food, found a better home on the same day. But were all together for a month and a half - attacks again, but not so vicious, the second scooter tried to become pale and invisible and sometimes even fight back. It was not good.
Conclusion:
if you wish keep them (at all) - keep it alone, less risk.
And the tank with macroalgae or a lot of corals is preferable to the fish only tank.
Next page: Appearance