I like my bristleworms :mrgreen: and have some fairly big ones 8O that come out of their rocks to eat fish food if it comes close enough to them. I have noticed several babies coming out of the rocks too the last couple days. I bought a couple dozen babies from Inland Aquatics last summer. Do aquarium bristleworms lay eggs or give birth? I know they (mine) don't swim around and burst to release eggs and sperm. :lol: