Marin I.N. 2023. Deep associations: the symbiotic relationships between amphipods and large invertebrates from bathyal of the Sea of Okhotsk // Invertebrate Zoology. Vol.20. No.1: 108–112 [in English].

A.N. Severtzov Institute of Ecology and Evolution RAS, Moscow, Russia. E-mail: ,

doi: 10.15298/invertzool.20.1.06

ABSTRACT: Deep-sea photos taken during the cruise of r/v “Akademik M.A. Lavrentyev” in the Sea of Okhotsk in 2013 revealed interesting symbiotic associations between marine amphipods (probably, Stenothoidae) and predatory sponge Chondrocladia cf. lampadiglobus Vacelet, 2006 (Demospongia: Cladorhizidae) at a depth of 1587 m as and with large hydroids of the family Tubulariidae Goldfuss, 1818, probably Ectopleura L. Agassiz, 1862 or Tubularia Linnaeus, 1758, at a depth of 1580 m. These data represent the evidence of symbiotic relationships between amphipods and deep dwelling marine invertebrates as well as the first record of their relationship with a deep-sea predatory sponge of the family Cladorhizidae.

KEY WORDS: Associations, symbiosis, Amphipoda, Hydrozoa, Tubulariidae, sponge, Cladorhizidae, bathyal, Sea of Okhotsk, North Pacific.

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