Pseudoceros lindae is commonly known as Linda's Flatworm. It can grow to 8 centimetres in length and is found in tropical seas from Eastern Africa to the Western Pacific.
| 
                            Linda's Flatworm
                            Pseudoceros lindae
                         | |
|---|---|
| Scientific Rank | |
| Kingdom: | Animalia | 
| Phylum: | Platyhelminthes (Flat worms) | 
| Class: | Rhabditophora (Flatworms) | 
| Order: | Polycladida (Flatworms) | 
| Family: | Pseudocerotidae (Pseudocerotidae) | 
| Genus: | Pseudoceros (Pseudoceros) | 
| Species: | Pseudoceros lindae | 
| Size | |
| Average Size: | 8 centimetres | 


Philippines, Puerto Galera
Philippines, Tubbataha reef
Here's the one I saw in Puerto:
https://www.flickr.com/photos/arne/49553535656/in/photolist-854CX7-2iuSPJq/