<font color='#0000FF'>Thanks for the comment.
Funny you should say "clear water". My buddies complained about the visibility... we thought maybe a boat had passed by recently. Can't have been more than 10-15 meters or so.
About the shrimp: We found a shrimp on that wall a couple of weeks ago. It looks a bit like a tarantula looking from the front... and does not belong here! So we went back to have a looksie.. this time with camera. No joy. I'll have to go back there again and again...
This is most likely what we're looking for:
Kyrre