Justin at Ocean Aquarium showed me his new batch of Rasbora maculata. I raced home and looked it up. Doesn't exceed an inch. Good in a community tank with fish small enough to pose no threat. Comfortable in a shrimp habitat. Plays well with Siamensis. I bought two for Asgard.

UPDATE: These little guys are a real hoot. They're very active and like to swim against the filter current. Most interesting about them is their comfort in all levels of water: you're as likely to see them weaving through plant stems at the bottom as you are to see them darting back and forth near the surface. They are unquestionably schooling fish, since the two of them seem most comfortable when they are together. However, they are intrepid on their own, embarking on little explorations that may separate them for several minutes if not longer.

In keeping with the Norse theme, I decided to name the rasboras Huginn and Muninn, after the ravens who scouted the earth and reported their surveys back to Odin each night. Huginn and Muninn join the Norns (Tiger shrimps Urd, Skuld, and Verdanda), Lif and Lifthrasir (Crystal Red shrimps), and Thor (SAE), plus all the little unnamed Asgardians spawned by the Norns.