Gobies

[sharuq1]

What about a Hi Fin Red Banded Goby? - (Stonogobiops nematodes)

[seashells]

How about yellow clown gobies? Realy cute & fun to watch... call them the sticky fish. will lay eggs if you have 2 & stay small. Same with green clown gobies.

[Moogled]

The Hi Fin Banded Goby (from online research) seems to say that they might be more aggressive towards tankmates in smaller tanks.

In all honesty, I would go for a cookie-cutter goby. Some of the more special ones are either hard to get, expensive, require more than one feeding a day, or moderately difficult to keep.