The caridean shrimp Bathypalaemonella serratipalma was photographed by a remotely operated vehicle at 1120–2223 m in the northern Gulf of Mexico. The shrimp was living on previously unreported host cnidarians of the families Isididae and Alcyoniidae, and a black coral (Antipatharia), as well as previously reported gorgonian hosts (Chrysogorgia and Iridogorgia spp.). We did not observe interactions between B. serratipalma and other invertebrates living on these hosts, nor did the shrimp occur on the same host cnidarians as the anomurans Uroptychus nitidus or Eumunida picta.

New Records of Dendrobrachia bonsai have been reported in various locations along the western coast of Corsica. These findings offer additional information on the northern distributional limits of this very scarcely-known gorgonian in the western Mediterranean basin.

The shrimps Neopontonides chacei, Tozeuma serratum and Periclimenes iridescens, a barnacle (Conopea galeata), two species of gastropods (Ovulidae) and the oyster Pteria colymbus live on Leptogorgia spp. in the northern Gulf of Mexico. For each species and related species in the area, we give records and notes on coloration and behaviour.