Killifish

mistergreen said:

They're a wide group of fish. Some are annuals, some not. Some are shy, some are pugnacious. Some are best in a species tank, some are ok in a community tank. They're all colorful.

I'm looking at Blue Gularis Killifish (Fundulopanchax sjoestedti) for my 75 community.

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Have them and love them! Most stunning killifish. Pretty big too. Just be careful, I lost all females - you really need AT LEAST 3 for every male. Other way males will go after them too much and even kill them.

Look at my beautiful young male (I've bred them and raised him from egg):



His cute, mean smile!

Top must be really tight, that's true, one of my females stressed out got out from my tank through a small hole for pipes. Now I have some sponge in there. They can feed really aggressively that's true too. Older one of mines is jumping to get the food before it reaches the surface, sometimes he grabs my finger :-D With congo tetra they're more or less on the same level of aggressive eating, but ropefish can't catch up with them. What's worse - even being not so big fish, blue gularis (and any killifish) have so big mouths, they can eat really big things... and fish. I didn't see any aggression towards other species. They just eat quicker, but never saw them harming any other fish.
Many small killifish can be kept in 2-5 gallon tank, but recommending 10 gallon for blue gularis sounds crazy. They need much more. I wouldn’t put them in anything smaller than 20g and only one male of course.
In general I would say that killifish are good community fish, but only if they can't fit other fish in their mouth. They are not nipping on other species, just eating them in one bite, really big bite.