My wife thought she would surprixe me and purchase some fish for me. I got home one day and found she had put 6 glow light tetras in my 55 with my large angels. I tried to net them out but they would hide in my plants. I gave up and figured they would be an expensive meal for my angels. Not only can my angels not seem to catch them, the tetras after being chased, come back and swim right in front of the angels, seeming to dare the angels to try again, This has gone on for a week and the angels have given up, at least until the tetras bug them enough. I have never had tetras, and was wondering if this is common behavior?