You have 4 separate color ramps, each in a single hue. Change hue for each tone in each ramp, and try to have common colors between them (see here and there).
Also, since it's an underwater mysterious creature, it might look better in darker, colder tones; and with a less saturated background.
The green dots don't work with the realistic, huge monsterness.
Add contrast, mysterious shadows, give it a more defined light source.
Behemoth is huge, right? What about something to show scale? a miniature whale, a sinking ship...
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Good idea, nicely done, but could improve! ;)
Some problems:
You have 4 separate color ramps, each in a single hue. Change hue for each tone in each ramp, and try to have common colors between them (see here and there).
Also, since it's an underwater mysterious creature, it might look better in darker, colder tones; and with a less saturated background.
The green dots don't work with the realistic, huge monsterness.
Add contrast, mysterious shadows, give it a more defined light source.
Behemoth is huge, right? What about something to show scale? a miniature whale, a sinking ship...