Well, outside, my family has a small koi pond, with a small stream/plant growing place. A while ago, I was shifting rocks around, looking for pretty ones to put in my tank, and I saw this pinkish red worm about an inch long(not an earth worm), and it was really gross looking (but then again I hate bugs and worms and spiders with a fiery passion), and I watched in horrified fascination as it sorta swam out of sight and into the rocks. Do you think it was a bloodworm? Is it safe to give to my betta? My pond never has anything added to it, so I know it hasn't come into contact with pesticides, or fertilizers, etc.