You may get .psd* file of "Shiny and glossy Frog" Photoshop tutorial by making a donation. Put the tutorial title in "Add special instructions to seller" line of PayPal and it will be sent to you shortly.
Load the selection to the layer with the body and forward paw - Ctrl + Click.
Create a new layer and fill it with the black color.
Arrange this layer under the layer with the body and paws. Apply Gaussian Blur filter (4.3) to the layer and make the layer translucent.
Draw the silhouettes of fingers in a new layer. Apply to them the following style adjustments.