well they certainly look like majano to me.kinda hard to tell but i have some too and they do resemble that basic shape and color.i am able to keep mine under control with joes juice.ill tell you this much,you should do something about them now before they get out of hand.i let that happen a while back and it was frustrating.it is my belief that once the m/fers show up in your tank you never really have a chance to get rid of them,just kinda control them.they make it to places you never even knew they could and the next thing you know you start seein them again.i have joes juice and it works real well,tryin to control my nitrate levels to to help.finally got them to 0 for awhile now and their multiplication ability has really dropped off.a few in tank looks cool i think,just not the monster proportions they can reach.get rid of em.....:happy: