Woman underwater

Aside from the cruddy title. I am working on this picture and would LOVE any and all feedback. the hair needs work, but what else? HELP!!! (I've attached a larger version to see up close)

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Tools: Procreate
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Z for Zoom, or click the attachment.
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I will also post more on Instagram and twitter, come say hi! oh... and check out my portfolio nickjarvis.com