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CPDs murdered a shrimp!?

ZeeDeveel

ZeeDeveel

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Joined
20 Jun 2015
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88
Is this normal? Came home to find a shrimp with its insides everywhere and my CPDs picking at the flesh.

The shrimp was fine this morning and seemed healthy, I'm quite sure the CPDs have killed it. The tank inhabitants are just CPDs and shrimp.

The CPDs may have been hungry, they're new and i've been struggling to feed them as they're so shy. I'm trying to feed them micro sinking pellets that the LFS said they were raised on. They run and hide whenever I try and put the pellets in, I've managed to get some of them to come out and catch the sinking pellets but possibly not all, can't know for sure.

I'm leaving some of the pellets on the bottom of the tank and they seem to be disappearing so I think they are eating them.

Is this likely just because they're hungry or is this an expected behavior? I don't know what to do now, I really want shrimp in my tank.
 
Nick potts said:
They will definitely eat shrimplets, but an adult shrimp should be fine with them.

Chances are the shrimp died and they have eaten it after the fact.
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This is what I read before I introduced them, baby shrimp will get eaten but adults fine.

Now with more Googling i'm finding more stories of people saying their shrimp have been massacred by CPDs
 
ZeeDeveel said:
Is this normal? Came home to find a shrimp with its insides everywhere and my CPDs picking at the flesh.
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Hi @ZeeDeveel , How big are those Pearl Danio's and how big was the shrimp and what type? I've hardly ever seen a CPD above 1 inch. so If it would be an adult shrimp, say Cherry or Crystal, I find it unlikely that the Diano did it.

Cheers,
Michael
 
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Oh yeah, they’ll take an unlucky adult cherry if they get half a chance. They’re extremely proficient and active hunters more than willing to take a chance on something many times larger than their mouth.
 
Garuf said:
Oh yeah, they’ll take an unlucky adult cherry if they get half a chance. They’re extremely proficient and active hunters more than willing to take a chance on something many times larger than their mouth.
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Hi @Garuf, Well, thanks for that insight! I haven't had Pearl Danio's with shrimps so I wouldn't know .. I take it that my very large Cardinal Tetras and Black Neon Tetras are just lazy :lol: ... I've never seen them show any interest in my RCS shrimps or shrimplets - except for their pellet food dish where they eat side by side.

Cheers,
Michael
 
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Ah this is super annoying. I googled fairly extensively their shrimp suitability before purchase and everything I read was that they'd only go for babies. Now I've found a thread where someone calls them Murder Minnows and that they've killed over 100 of his shrimp.

The RCS in question was a fair bit bigger than a CPD. I'd say 1.5 - 2x the size.
 
Hi
why don't you try to source some live food on the smaller size to supplement their feed.It may build a habit of them CDP to hunt smaller pray and ignore the rest.My SAP Puffers took liking for certain foods only and refusing to eat snails and don't bother the Amano shrimp living with them.
Regards Konstantin
 
Konsa said:
Hi
why don't you try to source some live food on the smaller size to supplement their feed.It may build a habit of them CDP to hunt smaller pray and ignore the rest.My SAP Puffers took liking for certain foods only and refusing to eat snails and don't bother the Amano shrimp living with them.
Regards Konstantin
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Thank you I was thinking about this too. Do LFS stock Daphnia usually?
 
I would second trying live or frozen. Mine love it. Frozen daphnia is a good size for them or even Cyclops if you have any super small ones. It tends to stay up in the water column a bit so is enticing and I also feed with the flow still running. They seem to be much more interested in food that is whizzing about.

How many do you have in the tank and what is the tank size?

Any chance of adding more or another dither fish to help with their confidence. Might help to get them eating better.

Mine are anything but shy but they have quite a few pals and lots of places to hide. Despite the hides holes I see them in the open space even more than my cardinals!

I only have Amano’s which absolutely dwarf the CPD’s so can’t really vouch for smaller shrimp safety but I’m guessing feeding them up would help.
 
KirstyF said:
I would second trying live or frozen. Mine love it. Frozen daphnia is a good size for them or even Cyclops if you have any super small ones. It tends to stay up in the water column a bit so is enticing and I also feed with the flow still running. They seem to be much more interested in food that is whizzing about.

How many do you have in the tank and what is the tank size?

Any chance of adding more or another dither fish to help with their confidence. Might help to get them eating better.

Mine are anything but shy but they have quite a few pals and lots of places to hide. Despite the hides holes I see them in the open space even more than my cardinals!

I only have Amano’s which absolutely dwarf the CPD’s so can’t really vouch for smaller shrimp safety but I’m guessing feeding them up would help.
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I have a shoal of 6 in a planted bowl along with a few RCS. So no room for dither fish or a bigger group. No doubt a bigger aquarium would give the RCS a much better chance but as I said everything I researched said they wouldn't attack an adult shrimp and I watched their interactions, they seem to ignore the shrimp for the most part until I see one chewn to pieces today.

They are getting less shy with each day so feeding will get easier but I do think some tiny live food might be a good option. I wonder if frozen daphnia would still illicit a similar hunting response to live?

 
I see!! Not so easy to whizz it about in a bowl!
A very pretty bowl btw. 😊
I’m not sure tbf but as frozen can be much easier to source and keep, I think it’s worth a try.

If they don’t show an interest you can still try live and I think live is always nice occasionally anyway.

You could also try a micro worm culture. At least you could keep that going at home and not have to worry about keep going out to get live food….and they wriggle!! 😊
 
Yeahhhhhh Jaseon is on the money with this one, unless it’s an optical illusion and that’s a 10gallon bowl it’s a bit too far along the nano scale for fish and as he points out, shrimp, when added will be very much victimised given their very strong hunting response.

I feed mine on a mix of live, frozen and dried and in the year or so I’ve been keeping them they will hunt shrimp, their own fry, shrimplets and basically anything other than what I feed them.

I haven’t been able to get a stable cherry line going in their tank, they’re too good at picking of babies.
 
ZeeDeveel said:
Is this normal? Came home to find a shrimp with its insides everywhere and my CPDs picking at the flesh.

The shrimp was fine this morning and seemed healthy, I'm quite sure the CPDs have killed it. The tank inhabitants are just CPDs and shrimp.

The CPDs may have been hungry, they're new and i've been struggling to feed them as they're so shy. I'm trying to feed them micro sinking pellets that the LFS said they were raised on. They run and hide whenever I try and put the pellets in, I've managed to get some of them to come out and catch the sinking pellets but possibly not all, can't know for sure.

I'm leaving some of the pellets on the bottom of the tank and they seem to be disappearing so I think they are eating them.

Is this likely just because they're hungry or is this an expected behavior? I don't know what to do now, I really want shrimp in my tank.
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I've seen my neons doing this same thing few times but I'm sure my shrimp was already dead.
 
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