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Patch on head or just internals on view?


stephwheels

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Hi - I'm wondering what you peeps think about this black patch in the photo below. The shrimp population seems to have exploded and I would say it is a healthy tank. They are very active and out and about much of the time. I have seen one or two with this kind of thing - very few and far apart, and of the couple of dead shrimp i've had so far, none showed this. I'm pretty sure the other one I noticed like this was also berried. I'm adding 2 photos - on of the issue I'm asking about, and another of the shrimp in general so you can see their conditions etc. And also one more of another berried girl with no darkness. Thanks🙂

black resized.jpg

happy girl resized.jpg

happy campers.jpg

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Personally I don't think there is a problem, the black is beneath the shell and in an area that is usually not visible where there are organs etc. This shrimp has very poor quality colouring unless maybe it was supposed to be a 'red rili', but is still interesting, and early berried (the eggs are still yellow, the yolks)! 

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Hi and thanks for your response. One thing I thought to add afterwards is that she has the same patch both sides of her head - making it seem less "disease like" to me.

I think her colour is just the photo at a bad angle perhaps. What do you think of the colour of the the girl in the other pics?

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2 hours ago, sdlTBfanUK said:

The second photo looks like a bloody mary or a very high quality at least.

That is the first I have heard of Bloody Mary's, but just did some quick research from which I understand they have red pigmented flesh rather than shells. All the molts I see are definitely clear or white in colour - does that support the Bloody Mary theory? Or are CRS molts the same? Thanks for the input 😊

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All shrimp molts are clear, sometimes called ghosts (I think that is a great description, not to be confused with ghost shrimp though)  so you can't really tell by that (even caridina shrimp molts are clear as well) and very high quality Red cherry do look very similar to bloody mary shrimp. People thnk the last lot of shrimp I bought were bloody mary, but they were just very good grade red cherry (bloody mary were out of stock at the time).

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Ok - thanks for that. I did some more research and found some useful info on this page

https://aquariumbreeder.com/red-cherry-shrimp-grading-with-pictures/

I think i have some Rili's in there too lol. Now I know i need to keep up with the selection program!

2 hours ago, sdlTBfanUK said:

The second photo looks like a bloody mary or a very high quality at least.

That is the first I have heard of Bloody Mary's, but just did some quick research from which I understand they have red pigmented flesh rather than shells. All the molts I see are definitely clear or white in colour - does that support the Bloody Mary theory? Or are CRS molts the same? Thanks for the input 😊

possible 'rili'.jpg

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      If that is the offspring, then the parents are unlikely to be PRL. I tend to agree with you. There are very few PRLs in Australia. And any that claim to be needs to show proof. PRL genes have to start as PRL. CRS that breed true after x generations doesn't turn it into a PRL. Neither can a Taiwan bee shrimp turn into a PRL despite how ever many generations. I've never seen a PRL with that sort of red colour. I have on Red Wines and Red Shadows - Taiwan bee shrimps. So somewhere down the line one of your shrimp might have been mixed with Taiwan bees and is no longer PRL. It just tanks one shrimp to mess up the genes of a whole colony. 
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    • sdlTBfanUK
      Thanks for taking the time to do the update and photo. Very pleased to hear it is now going so well. Different plants have different requirements so you need to check they will thrive/survive with the setup, light requirement/co2 etc or just get more of what you have, there are various Anubias if you want some variety. The number of shrimp shouldn't affect what plants do well! Maybe just get one plant at 6 month intervals and have another go, things change in time and you don't need many in a small tank, and the ones you already have will grow over time as well. Good to hear you got rid of the scuds, I did the same, manual removal when I had them, but I caught it quite quickly and only had substrate in the tank!
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