Spirorbinae. a ubiquitous group of marine calcareous tubeworms with a small body size as adults. have a fascinating diversity of brooding modes that form the basis for their taxonomic division into six tribes (traditionally subfamilies): in-tube incubation. with varying degrees of attachment to adult structures (four tribes). https://www.roneverhart.com/Castello-di-Amorosa-Il-Barone-Napa-Valley-Cabernet-Sauvignon-2007/