Sulawesi shrimp mating – any insights?

Greetings, I'm Jude Sun, a passionate Sulawesi shrimp enthusiast hailing from China. My fellow hobbyists and I have frequently observed Sulawesi shrimp in what appeared to be a mating ritual: the male perched atop the female. This sighting naturally led us to believe we were witnessing their mating process.

However, unlike other Caridina species that engage in belly-to-belly mating positions, Sulawesi shrimp merely mount each other, sparking our curiosity about how fertilization actually occurs. Some speculate that Sulawesi shrimp female only mate once per molt, which could explain why we rarely see them in a more intimate position a second time. We eagerly seek insights from fellow Sulawesi shrimp keepers to enlighten us on this matter.

To further document and share our findings, I have posted a video on my YouTube channel:

My observations of Caridina dennerli, in particular, reveal intriguing pre-mating behaviors such as grouping together and forming queues.
Caridina dennerli – a male on top of a female.
Caridina dennerli – two males on top of a female.
Caridina spinata – a male on top of a female.
Caridina caerulea – a male on top of a female.
Caridina dennerli – a male on top of a “Blue Ghost”.
Caridina longidigita – a male on top of a Caridina spinata female.

Note: Have these photos raised any questions about Sulawesi shrimp crossbreeding? This is entirely understandable and appropriate. We'll have more information on that soon! (Look here.)

We would be thrilled if anyone could offer their thoughts or expertise on Sulawesi shrimp mating habits.

Please contact Sulawesi Keepers if you want to share your own experience!

Jude Sun