Shrimp ID, please.

[Jorge]

Anydody knows which species is this?















thanks in advance

[MoltenLava]

They look like Snowball shrimps.

http://www.petshrimp.com/snowballshrimp.html

But I'm more curious what kind of digital cameras you have. The pictures you posted are one of the best fishtank pictures I've ever seen.

[Jorge]

Cant be a snowball... The eggs are too small and abundant to be a white pearl.

Even larvae have zoeal stage, this taken with microscopy, is about 1 mm, 1 day old:



I would like to know which species it is

[badflash]

They look like Caridina japonica (Amano) to me, but more transparent than I'm used too. Normally you can see spots on their sides, but not always.

How big are they?

[Mustafa]

They are neither Amano nor snowball shrimp. Actually, it looks like you are showing us two different species on your pictures. The shrimp on the third and fourth picture are different from the others. Those particular shrimp belong to the Caridina nilotica "group" of shrimp, but which particular species they are I don't know. I have had them before and they came from India. They get pretty large actually, larger than most dwarf shrimp.

As for the the other shrimp...I have no idea. One of the many unidentified "mystery" species that are being imported.

[Jorge]

Someone has suggested here that could be Aetyaephyra desmaresti what do you think???? [/url]

[Mustafa]

Someone has suggested here that could be Aetyaephyra desmaresti what do you think???? [/url]

It's not A. desmaresti. It's body shape and rostrum look totally different. People there are just taking wild guesses at this point. Nobody seems to have noticed that you actually have two species on your pictures (and you really do...trust me). You're not going to be able to identify every mystery shrimp at this point unless the shrimp is one of the more commonly seen species/varieties.

[Newjohn]

Mustafa

You sure have a keen eye.

I could see a slight difference in the body shape, but , the rostrum
I could not see a difference.

John

[Mustafa]

Mustafa

You sure have a keen eye.

I could see a slight difference in the body shape, but , the rostrum
I could not see a difference.

John

It all comes with practice. You can't really tell how many "teeth" the shrimp have on their rostrum just by looking at a picture, but you can tell the rostrum shape and length after a while. It does take some training though.

[Newjohn]

Mustafa

I finialy seen those "teeth" you were talking about on the rostrum.

The picture I posted of the M. Lanchesteri, Shows them fairly well.

To bad, I can not see them on the smaller Species.

Is there any reference material, In english, That I could read up on.

There is a old saying
Look at the horses teeth before you by it.

I guess I will have to do the same with Shrimp

John

[Mustafa]

Is there any reference material, In english, That I could read up on.

Yes, there is, but it's all scientific journal articles and you need either a university access account or a private subscription to scientific article delivery service (something like 800+ dollars a year) to receive those articles. Even then, it's too much scientific gibberish to be understandable to most hobbyists. Those "teeth" are one of the things that scientists look at when trying to differentiate species. I personally think this physical characteristic type of species classification is flawed, as there is huge variation even within a single species.

For our purposes, externally visible characteristics (color, body shape, rostrum shape) and intermixability are more important when it comes to identifying various shrimp varieties. Then we'll wait for the scientists to "discover" those species and actually provide a scientific name.