Updated taxonomic data are presented for 34 species belonging to 12 vetigastropod families collected from Canopus Bank, a seamount off northeastern Brazil. Distributional ranges are extended for 12 species, and bathymetric limits are revised for another 12. Five species: Emarginula suspira, Hemimarginula hemitoma, Profundisepta volcano comb. nov., Homalopoma boffii, and Parviturbo brasiliensis are reported for the first time from northeastern Brazil, extending their known distributions northward from southeastern waters. Five additional species: Arene flexispina, Diodora fluviana, Diodora listeri, Haplocochlias risoneideneryae, and Solariella quinni exhibit notable range expansions in Brazilian waters. The Caribbean species Dentistyla dentifera is documented for the first time in the southwestern Atlantic. Four new generic combinations are proposed in light of new evidence: P. volcano comb. nov., Puncturella canopa comb. nov., Puncturella cearensis comb. nov., and Puncturella columbaris comb. nov. Three new species are described based on shell morphology: Arene asteria sp. nov., distinguished by its low, keeled shell with a star-like outline and a strongly sculptured base and operculum; Parviturbo cancellifer sp. nov., characterised by its broad, tricarinate shell with a lattice-like sculpture; and Parviturbo durian sp. nov., noted for its strongly nodulose, spiny shell with a wide circular aperture bearing nine denticles and a distinctively sculptured base. Comparisons with related taxa are supported by high-resolution photography, scanning electron microscopy, and computed tomography reconstructions.

We present the first record of the very large deep-sea mytilid Gigantidas horikoshii Hashimoto & Yamane, 2005 outside of its type distribution, based on a juvenile specimen collected by fishermen at the Tashi fishing grounds east of Taiwan. This record extends the distribution of the species in about 20 latitudinal degrees to the west (about 1916 km), and it is the first record for this species outside the Izu-Ogasawara Island-arc, southern Japan, representing the westernmost geographic limit of this species and the first record in Taiwanese waters.

The carapace and chelipeds ornamentation of the deep-water spider crab Rochinia umbonata (Stimpson, 1871), from the Western Atlantic undergo very dramatic ontogenetic changes. Since the also deep-water spider crab Rochinia confusa Tavares, 1991 is differentiated from R. umbonata mostly on the basis of these characters, R. confusa is regarded herein as an ontogenetic stage and, therefore, a junior subjective synonym of R. umbonata.

Greenland has more than 200 years of history of studies of the sponge fauna and is the type locality for a number of species. Many of these have not been encountered since, and as the type material has been hard to find or even lost, their taxonomic status has remained uncertain. In this study all species of calcareous sponges previously reported from Greenland are reviewed. The revision is based predominantly on new or unidentified material collected during various expeditions, but also on material used by previous authors. This includes samples from all coasts of Greenland, from the southernmost Kap Farvel area to Peary Land on the northern coast, some of the northernmost records of calcareous sponges ever. Greenland is a transition zone between the western and eastern Atlantic boreal calcareous sponge faunas, being home to species from both sides of the North Atlantic combined with some true Arctic species. There is also a strong link between the Canadian and Greenlandic sponge faunas. Twenty-eight species have been identified, from which six are new to Greenland and one is new to science. New records for Greenland are: Clathrina arnesenae (Rapp, 2006); Clathrina camura (Rapp, 2006); Clathrina pellucida (Rapp, 2006); Sycon abyssale Borojevic & Graat-Kleeton, 1965; Leucandra valida Lambe, 1900; and Sycettusa thompsoni (Lambe, 1900). Clathrina tendali sp. nov. has been described from western Greenland and Leucosolenia corallorrhiza (Haeckel, 1872) and Leucandra penicillata (Schmidt, 1869) have been resurrected. Keys for identification of higher taxa and the different species of Greenlandic Calcarea are provided.

Records of the anthiine fish genus Meganthias are rare and most species are only known from few specimens. On 17 February 2012 a specimen of Meganthias natalensis, ~400 mm standard length was caught in 150 m depth about 10 nautical miles off Watamu, Kenya. This is the first record of the species from Kenyan waters.