Thanks for your reply. General info for starters; and correct terminology (blush) helps. Gravid, not pregnant, got it, duly noted.
What behaviors might a gravid female display? I'm trying to ascertain if A: I indeed have a female, and if so, what might she look like if she's gravid, and what behavior(s) might she display?
For the past few days, she's been uncharacteristically sedentary, taking up a resting "spot" at the bottom of the tank, alongside a cozy rock feature.
I'd read that the male displays a slight increase in "aggressive" behavior, nudging the female when she's near the bottom, to get her to lay her eggs. That's as much as I know, other than the male will fertilize the eggs once she lays them. (I hope that's correct terminology).
It's important to note; she's been paired with a white fan tail, except for color, they're twins! They swim together, seemingly taunt each other (do fish play/tease each other?), but always in proximity to each other. When they sleep, they're very near each other.
They've been in treatment for an intestinal parasite which causes them to produce stringy, long, white feces.
Thanks again, any info is greatly appreciated.
Four Zebra Danio; 2 Tiger Barbs. Aquarium is approx. 2 years. 29 gal freshwater; Fluval 206 (bio-mech/ammo-carb/polisher), Whisper 40 air; Current Freshwater LED. 4 Anubis plants (various sizes); one small drift wood log. Pea gravel substrate, approx. 1-1/2" deep. Avrg. Chems: Ammo=0, Rates=10ppm, Rites=0, pH=7.0, Temp=78degF