Some species have tentacular cirri and all have unbranched parapodia. There are large tentacular nerves projecting into the cephalic tentacles. Peristomium fused with the first body segment, with usually two pairs of tentacular cirri. The tentacles have eight longitudinal rows of suckers on the dactylus of the tentacular clubs. The first body segment with 1-2 pairs tentacular cirri without aciculae. Newly hatched medusae have 4 tentacles, with an additional 4 immature tentacular buds. When not feeding, the lophophore retracts into the polypide through the tentacular sheath. These are marine tube-dwelling animals having anteriorly one or more tentacular arms. Another spherical photophore is located at the base of the tentacular club. At first they creep across the substrate with the tentacular region leading. Its primary tentacular cnidae are club shaped. Tentacular clubs are short and narrow, with 8-10 longitudinal series of numerous, minute suckers. The females of this species also have longer tentacular clubs. The Logrus appears as a tentacular force that must be navigated on a magical/mental level. She co-curated the Tentacular festival at the Matadero in Madrid in 2019.