from saltwaterfish.c@m
"A group of neon gobies kept in the same tank will readily pair off and spawn, although it is wise to keep seven or more in a large tank so as to avoid any one individual being the target of too much inter-species aggression (one neon goby per 25-30 gallons is a good rule of thumb in my experience). A confirmed pair of neon gobies may be kept in a much smaller aquarium."
I had 3 in my tank, guess they were all males as I soon had 1.
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