For a special someone. Made in Photoshop, including the Venom jaw. Includes layer style tutorial for the Symbiote style I made.
The Full Poster.
This effect should be done using a Liquid brush of some sort, you can find them for free online, and using a Black color. First, the Bevel & Emboss settings.
Next, the Contour.
The texture, using the stock #5 texture that comes built into Photoshop.
The Inner Glow dictates the liquid shine/shadow effect.
The Satin.
The Color Overlay dictates what color the Symbiote will be.
The drop shadow adds depth for making it appear that the symbiote is placed on a surface.