Human Hybrid | Idea One

My first idea for my hybrid was to make some sort of sea creature mainly heading towards a mermaid/merman sort of thing, at first I wasn't sure how I wanted to create this especially having to make a prosthetic piece. Thats when the penny dropped that it is a hybrid I could really come up with any idea and then come up with a story behind how my hybrid is the way it is.
Because I wanted to create a merman I then thought how I would be able to bring that into a costume and obviously making a tail but I don't have that much to make one so I thought about buying one however they are either expensive, not the sort of ones I had in mind or for little kids to dress up as them, this wasn't the only reason why I wanted to change my hybrid, I was always torn between a sea creature and then a woodland creature. At this point I was more leaning towards a woodland creature instead. However below are photos I have found that gave me inspiration to think about creating a mermaid/merman.

Image 1: https://uk.pinterest.com/pin/571042427725800032/ [11th November 2015]
Image 2: https://uk.pinterest.com/pin/531706299730613296/ [11th November 2015]
Image 3: https://uk.pinterest.com/pin/351773420869156016/ [11th November 2015]