Actually, this is an old story, but now in ebook format at Kindle, B&N, and Smashwords. Since I just uploaded, the links are necessarily working yet. But here's what I've got so far:
Fish Story on Kindle. Hey, they've already got a link for it! Only 99 cents.
Fish Story on Smashwords. Of course, I've got a secret code to get a free copy for those of you who have the decoder ring (that is, you have my direct email address).
Fish Story on Barnes and Noble.
The colonists on a new planet find they can't eat the native plants or animals. They find an edible fish, and it just might save them. But the new fish might be more than they can bite off and chew.
Previously published in The Fifth Di... on-line ezine and in Wondrous Web Worlds #7 from Sam's Dot Publishing.