Common Trawl Fauna in the Chukchi and Beaufort seas Miscellaneous Taxa Disclaimer: This is not a complete guide to the trawl fauna of the Pacific Arctic. There are many other species that are not presented in this guide. Most identifications of the depicted organisms have been verified by a variety of taxonomic experts but small taxonomic features may not be clearly visible in the images and could lead to confusion with similar taxa. As such, it is recommended that identification of new collections may be aided by this guide but that final identifications should be confirmed on vouchers by taxonomic experts. Katrin Iken, College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, USA (contact: [email protected]) Bodil Bluhm, UiT The Arctic University of Norway Version: January 2021 Boltenia ovifera Ascidiacea 2 cm 1 cm Boltenia villosa Can be fuzzy when small 1 cm Stalked Boltenia echinata Not stalked Distinct “spiky” tunic cover Halocynthia aurantium Ascidiacea 1 cm Styela rustica Often many small individuals 1 cm Dendrodoa lineata 1 cm Pelonaia corrugata 1 cm Ascidiacea Ascidia callosa 2 cm 2 cm Thick tunic Solitary tunicate Can be transparent or brownish Ascidia obliqua “eggplant” shape, large size 1 cm Adjacent siphons on upper surface Molgula retortiformis 1 cm Often overgrown Distinct “snorkel-like” siphon extension Ascidiacea Molgula griffithsii 1 cm Chelyosoma macleayanum 1 cm Distinct honey-comb pattern Often in groups On rocks or epizoic Ascidiacea Distaplia occidentalis 1 cm Distaplia alaskensis 1 cm Eudistoma parvum 1 cm Ascidiacea Synoicum pulmonaria Diplosoma listerianum 1 cm Encrusting, soft colony texture Polyclinum sp. 1 cm Large, oval-shaped, colonial Ascidiacea Didemnum albidum 1 cm 1 cm Usually white or grey, but can be pink Trididemnum sp. Ascidia grey or pink colonial, overgrowing other organisms Porifera Echinoclathria beringensis (previously: Phakellia) 1 cm Suberites luetkeni (previously: Choanites) 1 cm Semisuberites cribrosa (previously: Phakellia) Porifera 1 cm Polymastia sp 1 cm Vulcanella sp 1 cm Haliclona sp Halichondria sp 1 cm 1 cm Stomphia sp. Actiniaria 1 cm Hormathia nodosa 1 cm Allantactis parasitica Always attached to snail shells, common in Beaufort but not the Chukchi 1 cm Actiniaria Metridium sp. 1 cm Zoanthidea Actiniaria Amphianthus sp. 1 cm Anthosactis janmayeni 1 cm Flattened, but it can also be ball- or column-shaped Edwardsia sp Mostly buried in sediment Octocorallia Gersemia spp. (Nephtheidae) 1 cm Multiple species, some can only be distinguished microscopically Umbellula sp. Tubularia sp. 1 cm Lafoeina maxima Hydroidea Look like pipe cleaners Bryozoa Alcyonidium gelatinosum Can form strings several meters long 1 cm Alcyonidium disciforme 1 cm Eucratea loricata 1 cm 1 cm Greyish-colored dense bushes Many others…… Brachiopoda Brachiopoda 1 cm.