Codonorchis octaedrus is recorded for the first time since its discovery by Haeckel in 1879. A hydroid colony collected in a cave of the Apulian Coast (between the Ionian and the Adriatic Seas) produced several medusae which have been reared to maturity.

Two specimens of pandeid species, Eutiara decorata Berberian, Michenet and Goy, 2021 were collected from Kumejima Island in Okinawa Prefecture, Japan. These specimens with a small white apical process were not yet fully-grown adults. A hyperiid amphipod,

Using 16S, COI, and ITS DNA sequences, it was possible to link a Norwegian marine hydroid formerly known as Leuckartiara abyssi (G.O. Sars, 1874) to a Neoturris medusa occurring in the same region. Although the Norwegian medusae showed some slight morphological