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Note: This image might be disturbing.

I want to know what the red and the black structures (directly posterior to the red structure) are. I guess it's the heart.

enter image description here

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are you sure about the antero-posterior axis in this picture ? BTW, The image is not that disturbing but i think it is not a very good dissection :P – WYSIWYG Apr 28 '14 at 6:23

I guess you got your antero-posterior axis wrong. If I am correct then anterior is right and posterior is left in your image. In that case the black structure should be the cerebral ganglion and the red should be the heart. See the image below.

enter image description here

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Aren't eyes of a prawn located at the anterior end ? If so, the red is towards the anterior end and the black towards the posterior. (I am not talking about the two black structures ie eyes. I am taking about the "black" to the left of the heart in the picture which would be posterior to the heart in prawns. – biogirl Apr 28 '14 at 11:57
eyes are in the anterior but i cant see the eyes in your picture – WYSIWYG Apr 28 '14 at 13:15
see this picture. this is another species of shrimp but you can clearly see eyes anterior to the cerebral ganglion. also it seems that you have dissected on the ventral surface; eyes are present on the dorsal surface. – WYSIWYG Apr 28 '14 at 13:26
I have dissected the dorsal surface and the 2 black structures are definitely eyes. – biogirl Apr 28 '14 at 14:04
No.. The two dark things in the right of this pictures are the eyes/ – biogirl Apr 28 '14 at 14:15

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