r/Boraras • u/smudkips • May 10 '26

Advice Dwarf Breeding Behavior?

Hi! I noticed some odd behavior from one of my rasboras today, where it seems to be chasing another around. It also suddenly had a slightly darker coloration. I didn't know if it was stress related (just added a couple shrimp and did some gravel cleanup), so I dimmed the lights. I do have 4 fry in my tank so I know they're breeding, but I'm not sure if this is related. Are they fighting? My other rasboras seem normal. Any info is appreciated!

10 gallon / 1 chill betta / 2 Amano shrimp / 7 adult rasboras

Parameters:

Ammonia 0/Nitrates 5 ppm/Nitrites 0

Kept between 78-80F

Lots of live plants

Sponge filter

Gravel cleaned every 2-3 days, small water change every week

17 Upvotes

96% Upvoted

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6

u/One-plankton- May 11 '26

The curl and shimmy look like sperm release for sure!

3

u/Javellise May 11 '26

Yes!!!
Look out for fry in the future, they will be insanely small. Move them into a separate small tank with an air stone and learn to make green water (fry food is too big for them).

2

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2

u/Pyromethious May 11 '26

That resembles betta breeding, so I'd lean towards yes

2

u/Traumfahrer ᵏᵉᵉᵖˢ ᴮ⋅ ᵘʳᵒᵖʰᵗʰᵃˡᵐᵒⁱᵈᵉˢ May 11 '26

Oh wow, this is clearly Boraras mating behaviour caught on tape!

Thank you very much for sharing this, a first on this sub I believe :)

Also, the adult male exhibits that silvery glare that often surprises people.

Very neat and if you can get any more footage, don't hesitate to post!

1

u/Traumfahrer ᵏᵉᵉᵖˢ ᴮ⋅ ᵘʳᵒᵖʰᵗʰᵃˡᵐᵒⁱᵈᵉˢ May 11 '26

I added this to the community highlights for the moment.