I made her, for my husband for Christmas, to resemble/have elements from his 80 gallon saltwater tank. (he also has a 30 gallon fresh water tank and a 10 gallon salt tank...add in the 30 gallon sump and we have a lot of water in the house - ha)
her legs are dyed darker blue gradient.
Then i re-rooted her with "daiquiri ice' -- but before I started the re-root I dyed just the middle portion of the hank, so that the roots would be a darker blue.
her eyes were painted with acrylics. Her 'symbol' details where sculpted and painted. (the Coral-Banded Shrimp on her back has antennas made from monofilament (fishingline))
wip pics: [link]
and another: [link]

and I took her box and trimmed it out in black paper - to make it resemble the tank; i also included a shot of the tank