gourami use their "feelers" as fins, which is what they are.
so to hit the brakes they move the feelers forward.
to speed away the feelers get moved back.
when one is out and one is in they are turning......
2 of my pearls like to race each other and ive observed this behaviour for a few weeks now......
and i did mean race, not chase.
the 2 peals race with one of the red rainbows