Ok, so your Loch Ness-like pictures show a fish with quite a bit of girth, so I would take a guess on a female, but I could be very wrong.
A tip on photography: The camera doesn't seem to focus that close, which is why the pictures are quite blurry. Move a little bit further away, and then cut out the actual fish from the bigger picture you get when moving further away.
Also, adding a bit more light would help a fair bit, because it will make the fish more visible as well as making the camera choose a smaller aperture, so there is more depth of field (i.e. more of what is behind and in front of the actual focus distance will appear sharp on the photo).