Hydrozoans

Coral Sea, Duration 44 seconds

Gymnangium gracilicaule is not the primary subject of the video clip; the primary subject is Antennarius pictus (Painted frogfish). Indo-Pacific, Duration 63 seconds

South Pacific Ocean, Duration 10 seconds

Davenport, California, USA

Dendrogramma enigmatica sp. nov., paratype.Figure 4 from Just J, Kristensen RM, Olesen J (2014) Dendrogramma, New Genus, with Two New Non-Bilaterian Species from the Marine Bathyal of Southeastern Australia (Animalia, Metazoa incertae sedis) – with Similarities to Some Medusoids from the Precambrian Ediacara. PLoS ONE 9(9): e102976. doi:10.1371/journal.pone.0102976 A, B, lateral views; C, adoral view; D, close-up of disc surface; E, aboral view; F, tip of stalk; G, aboral view of notch of disc surface. SEM micrographs made after shrinkage. doi:10.1371/journal.pone.0102976.g004

Bougainvillia superciliaris Ag..

Tima formosa.

Ectopleura ochracea A. Ag. A.Lateral view. B.Aboral view.

Hybocodon prolifer Ag..

Diphasia rosacea (Linn.).

Tubularia crocea (Ag.) A., Cluster of gonophores.

Clytia grayi Nutting. A.Hydrotheca with hydranth....

Sertularia pumila Linn. A.Side view of branch bearing gonanglium.

Figure 6.Holotype of Errinopora fisheri, USNM 1123526: A–D branch tips with dactylopore spines arranged in crescents (female ampulla shown in figure D) E, H–I lateral view of gastrostyles F–G coenosteal texture J detail of gastrostyle spines K dactylostyle.

South Pacific Ocean, Duration 11 seconds

Davenport, California, USA

Dendrogramma enigmatica sp. nov., holotype.Figure 3 from Just J, Kristensen RM, Olesen J (2014) Dendrogramma, New Genus, with Two New Non-Bilaterian Species from the Marine Bathyal of Southeastern Australia (Animalia, Metazoa incertae sedis) – with Similarities to Some Medusoids from the Precambrian Ediacara. PLoS ONE 9(9): e102976. doi:10.1371/journal.pone.0102976 A, B, lateral views; C, aboral view, D, adoral view. Photographs taken after shrinkage. doi:10.1371/journal.pone.0102976.g003

Bougainvillia superciliaris.

Cladocarpus sigma, d'apres Bedot (Hirondelle).

Ectopleura ochracea.

Hybocodon prolifer.

Portuguese man-of-war.