its not a Ecsenius bicolor blenny, this one is solid black and his tail fades at the end into a pure gold color. no1 is fighting just the blenny the new guy is looking for a home to set into an he got close to my yellowhead jawfish an the jawfish had his mouth wide open like hey hey! and the blenny just swam by lookin for another hole, no nipping or anything just alarmed my jawhead