u/Rex_Buckingham_99

Cross-posted from r/Aquariums

Wondering wtf this thing is?

I found a smaller different one gliding on the glass this morning, and posted it to r/plantedtank. Mixed reviews of planaria vs leeches vs detritus worm.

Then this afternoon, I came across this guy gliding his way across the sand. It's roughly 0.5-0.75cm long. Posted this one (and this video) to r/Aquariums and so far consensus is weird unusual leech, though I am somewhat skeptical.

Also, when I posted the first one in the morning, someone suggested I try cutting it, to see if it survived like a planaria would. Well that went terribly and I only managed to mangle it, and it continued to scoot around, albeit slower than before. When I dropped the second one in the container, when it eventually came across the now disabled but still alive one, it seemed to attack it? You can see this at the very end of the video.

I added a sacrificial ramshorn snail and a few neocaridina culls to this container to see what would happen, but no one seems phased by any of the others.

Does anyone have thoughts? Is this actually a leech?

Thought this was interesting enough to post a photo for peeps to see.

Curious how common this is though, and what else besides ba water parameters might have caused it? Mine are fine, listed below.

Only a <5% water change two days ago, just needed some tank water to clean my filter sponges. So nothing big and destabilizing. Refilled with treated tap water, as usual.

Water parameters:

Temp: 23-25°C

PH: 7.4-7.6

Ammonia & Nitrite: 0

Nitrates: < 0.5 (yes, I'm cycled, I just have tons of water column feeder plants)

GH: 11

KH: 5

Tank mates: longfin zebra danios, neocaridina, orange river snails

Picture of tank for reference.

Just randomly noticed one of my shrimpies seems to have a giant injury or prolapse of some kind.. does anyone have any idea what this might be, or what may have caused it? It seems like an injury, and not a parasite? Water parameters and other details listed below.

For now, I've separated her into a mesh breeder box to keep her safe. But I'm wondering if this is something that can heal, should be treated, or if it's likely causing significant pain and I should just euthanize.

Any advice on how to proceed and keep her comfortable or ease any pain she might be in is much appreciated.

Water parameters:

Temp: 23-25°C

PH: 7.4-7.6

Ammonia & Nitrite: 0

Nitrates: < 0.5 (yes, I'm cycled, I just have tons of water column feeder plants)

GH: 11

KH: 5

Tank mates: longfin zebra danios, neocaridina, orange river snails