Add a mask to each of these two layers and use a soft black brush to blend the top of the fins with the eyes.
Create a group for the fin layers in the step 23, 24 and make a Color Balance adjustment layer to change the color of the fins.
Add a Curves adjustment layer to darken the fins. On this layer mask, paint on the top of the fins on the forehead to remove the dark effect there.
Open the jewelry image and select the jewelry to add to the middle of the forehead. Use Ctrl+T to make the jewelry rounder.
Make a Color Balance adjustment layer and alter the Midtones settings:
Create a Curves adjustment layer and increase the lightness. On this layer mask, paint on the lower and both sides of the jewelry to keep its shadow and contrast.
Open the coral 1 image and use the Lasso Tool to select the blue coral in the middle to add to the jewelry
Use the Elliptical Marquee Tool to draw a circle inside the jewelry and click the Add layer mask icon and you should have a similar result like below:
Duplicate this layer and move it to the right eyebrow (from the viewer) and use Ctrl+T with the Warp mode to bend this part to fit the form of the eyebrow. Continue duplicating this layer and flip it horizontally. Move it to another eyebrow.
Add a mask to each of these layers to remove the parts outside the eyebrows
Create a group for the coral layers and make a Curves adjustment layer to increase the lightness on the middle of the eyebrows and the jewelry. Paint on the rest to keep its shadow and contrast.
Make another Curves adjustment layer to darken both sides of the eyebrow and on the jewelry part. The selected areas show where to paint on the layer mask.
Come back to the coral 1 image and continue selecting this coral part to add to the model’s lips. Change this layer mode to Multiply 100% and add a mask to this layer. Use a medium-hard back brush to remove the part outside the lips.
Make a Curves adjustment layer to bring more light to some details on the lips. Paint on the rest to keep its lightness.
Open the jellyfish 1 image and use the Lasso Tool to select it to add to the left of the main canvas. Change this layer mode to Screen 100% and use a layer mask to soften the hard edges.
Make a Hue/Saturation adjustment layer to change the color of the jellyfish.
Create a Curves adjustment adjustment layer to darken the jellyfish to fit the light on the background.
Open the jellyfish 2 image and select two jellyfish in the middle to add to the right of the canvas. Change these layer mode to Screen 100% and use a layer mask on each of these layers to remove the hard edges around the jellyfish.
Create a group for these jellyfish layers and use a Hue/Saturation adjustment layer to desaturate the jellyfish a bit.
Open the coral 2 image and use the Move Tool to drag it into the main document and place it in the bottom right of the canvas. Convert this layer to a Smart Object.
Go to Filter > Blur > Gaussian Blur and change the radius to 8 px.