Edit: I messed up the research. Manta Air apparently operates only seaplane version of the Twin Otters. They take delivery of wheeled version and covert it to Seaplane version after removing the landing gears and attaching floats (details).
This is a repaint of the Aerosoft DHC-300 Twin Otter Seaplane in Manta Air colors. This livery in particular is the tail no 8Q-RAC. Nothing special about this tail number, just came across it in online images.
Manta Air is a Maldivian domestic airline which operates ATR72s and DHC6-300 Twin Otter Seaplanes.
I raised a request for this and the wheel version, the wheel version was created by ahsaul. I based some of the files in this one from that original livery. I asked and was granted permission to upload this modified version. You can find the original wheeled version here.
I have uploaded a bit more accurate wheeled version as well which can be found here.
I am not a livery creator, I am creating this livery only because I like this livery very much. Also, I am not experienced in Blender and Gimp and creating textures. So I could not create effects like smoke patches, dirts, scratches etc.
Again thank you ahsaul for creating the original livery and allowing me to modify it.