jj3967's picture

Freshwater Shrimp

Observed: 4th January 2012 By: jj3967
S159 Neighbourhood Nature - current student
jj3967’s reputation in Invertebrates

The body seems to be the same shape as a shrimp but it was very tiny (less than 5mm) and so it was difficult to tell

Species interactions

No interactions present.


jj3967's picture


Thanks for your help :)

Peadar na Breac's picture

Yes no doubt inopinatus...

I jumped the gun rather with G.pulex and you are completely right with the broad Gammaridae.Oh unless of course John is correct.But rest assured (unless by sheer luck I'm right)I'm the wrongest!!!!
Regards Peter

John Bratton's picture

Translucent greyish colour

Translucent greyish colour and that it was in a lowland lake suggests Crangonyx. But if the lake is brackish, that opens up a range of other possibilities.

AquaBugSpotter's picture

The ID to tell between

The ID to tell between Crangonyctidae and Gammaridae families classically depends on whether or not there are spines on the urosomes, at the rear end. In the low resolution of this image this is hard to tell.

I wouldn't like to definitively suggest it's either but given that it's in a lake, Crangonyctidae tends to do better in the lenthic arena so it's 'probably' that. [just 1 uk species.]
It has eyes so we can rule out Niphargus and it just doesn't look like Mysid shrimp et al.

Time flies like an arrow, but fruit flies like a banana.
5 Years pro aquatic ecologist.
Claim to fame: Discovered Dikerogammarus haemobaphes in UK.