I would have sacrificed the tendril to get the entire cap into the picture, but that is really nit-picking this one. I absolutely love it. Going into my favorites file. ****10****
Very effective colour and subject here. Sharpness/grain obviously suffering a little due to the location but really pulls off a feeling of peace for me.
I like the soothing deep blue of this, marred only by the little bits of purple on the jellyfish body. saturation issue? Or maybe an incomplete hue shift? Anyway, this is largely a peaceful image. Would like a tiny bit of headroom for the jeallyfish at the top if you could have managed it.
Can't decide if I like the tight (at the top) composition or not. With it tight it kind of attaches to the border and makes the image seem like one unit and allows the legs/tentacles (whatever you call them) to grab more attention. This connection also makes the image feel like a container and as a viewer I'm peering in. Either way, I think others will make this same item a point of contention. Could impact your score a little. All JMO of course. :-) Good luck!