I am new to salt water marine fish tank and just starting out. I have put live rock into the tank and introduced a scarlet cleaner shrimp who seems very happy after just over a week. I just noticed a caterpillar spikey thing about an inch and a half long. not sure if this is a bristleworm and will be a threat to my rock, coral and Shrimpy (very original name ha). Any advice very welcome. See attached pic.
Not added any fish yet as want conditions perfect before I do.