ID please??

found these red blobs growing a few weeks ago, theyre pretty stuck onto the rock; i tried blowing them and siphoning them out. just wanted to know if they were a kind of pest/ if theyre harmful to my tank. thanks!

http://ift.tt/1E6bZ2R

http://ift.tt/1Ib0Ssf

http://ift.tt/1E6bZj7