Can you identify this fish.

I was swimming and there was this fish about 4-5 inches long he was mostly black but had bright blue lines running across his head. The lines werent paralell or in any uniform pattern. I think he may of had a high forehead. I know it's not much to go on but let me know if you have an idea of what this is. I'll go back and catch him.

 

Not enough go to on.
Could have been a Neon / Devil Damsel.
Do you know the type of fish it is based on the shape.

 

Ummmm, telling us where you live and swim might improve your chances of getting an i.d. too.

 

I live in Jamaica and swim off the south coast. The fish was in about six feet of water.

 

OK, I'm still clueless but that's because I don't spend enough time in Jamaica, I think You might want to look into maybe purchasing this book for your future excursions.

Snorkeling Guide to Marine Life - Paul Humann