Gross ... LOL Your image is way too small. You probably need to read up on JPEG compression which allows you to make a full-sized image but keep the file size below 150
1, you don't know how to make your picture larger, go to resize image, change the largest dimension to 640, then apply, then go to save for web, then reduce quality until it's 150kb
2, that's nasty
The picture is too small to clearly make out what the subject is. It appears to be some kind of squid. The lighting on it makes it far from delicious looking though. Too harsh.
This is strange b/c the challeng said "artificial light source" and that glowing squid is a "natural" light source! However, I will overlook DNMC and give you what the shot is worth....
I would have like to see this bigger so I could better tell what it was.