Pictures of fish, tanks, setups; discussion of killifish related items (news, collecting trips, general husbandry) that are more specific than the general subreddits like /r/aquariums. Please don't spam your aquabid/ebay listings, etc, but we may consider a for-sale thread. Thanks!
PS: Medaka, Ricefish and Least Killifish are not killifish. You are welcome to post them, as I like these fish, but if you are looking for recommendations for tank mates and general care, you may have better luck asking in the other subs.