Amano shrimp disappear, one left? Does he need friends?

Crimson_687

Member
So my 3 amano shrimp like to be together. At least once a day, I get to see them all together.
For awhile now, I have been seeing only one shrimp out. They all look similar, but I am pretty certain this is the same amano every time. The one still eats and is very active, no concerns at all with him in health.

I try not to disturb plants, but I have shone a flashlight to their favorite hiding spots several times on different days at different times since I noticed. No sign of them at all. How they died, exactly when they died, or if they jumped- I have no idea. My tank has a lid, but if they wanted to get out, they could climb up the heater via wire through the back of the lid. If they did jump, they are certainly dead now, my cat might have even eaten them. They could turn up a month from now in the tank as if nothing happened. But as of now, I'm assuming they're dead. I haven't had any parameter spikes, at least that I know of, that would explain this. The only thing I can think of is that I had a small ich outbreak (reminder to always quarantine or dip plants I get from chain stores) and used API Super Ich Cure (liquid). I used this product before though, they didn't have any ill response the time before, and that doesn't explain why two would die and the other, as well as all snails and baby assassins, are all fine. I'm not sure how old these shrimp were, I think I got them in either 2017 or 2018.

Will the shrimp be fine alone or should I get companions? I do enjoy having them, but after learning that amano shrimp are wild-caught I'm not entirely sure how I feel about buying more, but if he needs companions I want to provide that for him. I am aware that Aquatic Arts supposedly sells tank-bred amanos, but they're all sold out. $10 a shrimp + shipping is a bit pricey too. I'm also a bit skeptical about ordering shrimp from them after reading mixed responses.

Edit: Ok, now I'm thinking its possible I have 2 shrimp, and it was the female that died. When I had all 3, they would especially flock together when the female was saddled. If the female died and left the two males alone in the tank, maybe they just don't feel the need to sit together or be out at the same time? The two males do look almost identical, and the shrimp I saw today seemed darker than the one I saw yesterday, though that could have easily been because I saw them at different times of the day on different lighting.
 

The2dCour

Member
The internet says: social creature.
Maybe add 4 or more?
What are your concerns with them being wild caught?
 

skar

Member
I've found them at select petcos for much less $ than online retailers.
Often labeled as Japanese algea shrimp or something Long those lines.

If that's an option for you.
 

CHJ

Member
My amanos disappeared as they ate each other. First the big females ate the small males, they they turned on each other.
Once they were down to one, she lived for many years in that tank.
 

StarGirl

Member
I have 3 and they are rarely by each other. I think if they have food the are good. I would get more just because of the way they clean. They are true scavengers.
 
  • Thread Starter

Crimson_687

Member
CHJ said:
My amanos disappeared as they ate each other. First the big females ate the small males, they they turned on each other.
Once they were down to one, she lived for many years in that tank.
thats very weird... maybe you had prawns instead of amano shrimp, or one died so they made a meal out of the dead one. They will for sure eat a dead shrimp, that's a lot of good protein for them and they can use the minerals from the exoskeleton.
skar said:
I've found them at select petcos for much less $ than online retailers.
Often labeled as Japanese algea shrimp or something Long those lines.

If that's an option for you.
Yes, these shrimps are from Petco actually. The one closest to me has a large fish dept. with good people and tanks not overcrowded, so I trust the health of their livestock. They would still be wild-caught though.
StarGirl said:
I have 3 and they are rarely by each other. I think if they have food the are good. I would get more just because of the way they clean. They are true scavengers.
They don't touch diatoms or black algae (nor do I expect them to), I have nerite snails as well. The shrimp are more because I enjoy them than for cleaning or scavenging.
Do you know if yours are male or female? I hardly saw mine apart, unless one was shedding or if they were hungry. Wondering if it was just because the males liked the female...

The2dCour said:
The internet says: social creature.
Maybe add 4 or more?
What are your concerns with them being wild caught?
I know they would probably enjoy a 36-gallon tank with the only other bottom feeders being snails, but there's no way of knowing how they were collected. Was it done responsibly? Were non-target animals hurt in the process of catching them? Does removing them from the wild damage the ecosystem? Would they prefer to be in the wild instead of in my tank?
 

StarGirl

Member
I want to say that the 3 I have left are Females. They were bigger and always had eggs going on. The Males just disappeared and now they do not have eggs any more. They just do their own thing. Even with the males in there (started with 5) they did their own thing. Don't know.. I guess it is personality just like any other fish?
 
  • Thread Starter

Crimson_687

Member
StarGirl said:
I want to say that the 3 I have left are Females. They were bigger and always had eggs going on. The Males just disappeared and now they do not have eggs any more. They just do their own thing. Even with the males in there (started with 5) they did their own thing. Don't know.. I guess it is personality just like any other fish?
Do you think maybe males do not live as long as females? Looking at my last shrimp I can see how it might be the female and not one of the males, that might explain why it’s just the one left.
 

StarGirl

Member
Crimson_687 said:
Do you think maybe males do not live as long as females? Looking at my last shrimp I can see how it might be the female and not one of the males, that might explain why it’s just the one left.
I have no idea. I don't even know if they died or escaped. They were just gone one day.
 

skar

Member
Crimson_687 said:
Yes, these shrimps are from Petco actually. The one closest to me has a large fish dept. with good people and tanks not overcrowded, so I trust the health of their livestock. They would still be wild-caught though.
I think almost all available are wild caught.
They are very difficult to breed in captivity.
Maybe a few have had success ?
 

CHJ

Member
Crimson_687 said:
thats very weird... maybe you had prawns instead of amano shrimp, or one died so they made a meal out of the dead one. They will for sure eat a dead shrimp, that's a lot of good protein for them and they can use the minerals from the exoskeleton.
True, I never saw a kill, just shrimp vanishing. I know they will hunt and eat cherries, not as bad as ghosts will but they are not specifically safe for dwarf shrimp.
On the other hand once it was down to 1 amano she lived for years so I do not think they were dying of natural causes.
 
  • Thread Starter

Crimson_687

Member
CHJ said:
True, I never saw a kill, just shrimp vanishing. I know they will hunt and eat cherries, not as bad as ghosts will but they are not specifically safe for dwarf shrimp.
On the other hand once it was down to 1 amano she lived for years so I do not think they were dying of natural causes.
Haven't tried mine with the cherries, mainly because my cherries are in a 5.5g and I feel like amanos are too active for that small a tank. I could see that amano might steal their food, but unless they were absolutely starving, I don't picture them attacking dwarf shrimp.
 
  • Thread Starter

Crimson_687

Member
Alright, I’ve been trying to find videos of how they’re caught in the wild or an article about them- except for a video from National Geographic about how shrimp, crayfish, crabs, and fan shrimp work together to keep estuary systems clean, I haven’t really found anything promising. They are listed as least concern though, so I guess that counts for something.

Does anyone have any videos or articles on amano shrimp in the wild? Or how they’re caught?
 

Latest threads

Top Bottom