Cnidaria n n n Sea anemones Corals Sea

Cnidaria n n n Sea anemones Corals Sea pens Jellyfish Hydra

Moon gastric cavity exumbrella radial canal epidermis mesoglea gastrodermis circular canal gonad tentacle rhopalium mouth/anus oral arm subumbrella

radial canal circular canal oral arm mouth/anus gonad rhopalium tentacle

mouth/anus tentacle gastrovascular cavity gastrodermis mesoglea body stalk epidermis

gastrovascular cavity gastrodermis mesoglea epidermis tentacle mouth/anus

Sea Anemones retractor muscle epidermis complete mesentery mesoglea pharynx incomplete mesentery gastrodermis

n Figure 1

Sea Anemones mouth siphonoglyph oral sphincter septal perforations incomplete septa complete septum pharynx gonads muscle band septal filament pedal disk

Sea Anemones

Planula

Stichodactyla mertensii

Alcyonaria n Eight tentacles that are pinnately branched

Ctenophora

Sea gooseberries

Sea walnuts

Venus's girdle

Cnidarians & Ctenophorans of the Pacific Northwest

Aggregate Anemone Anthopleura elegantissima

Plumose Anemone Metridium senile

Scarlet Anemone Urticina lofotensis

Mottled Anemone Urticina crassicornis

(Giant) Green Anemone Anthopleura xanthogrammica

Sea Pen Ptilosarcus gurneyi

Jelly Fishes

Cross Jelly Mitrocoma cellularia

Moon Jelly Aurelia aurita

Water Jelly Aequorea victoria

Orange Jelly Gonionemus vertens

Lion’s Mane Jellyfish Cyanea capillata

Sea nettle Chrysaora fuscescens

Hydrozoans Ostrich Plume Aglaophenia struthionides

Sail Jelly (By-the-wind-sailor) Velella velella

Ctenophora Sea Gooseberry Pleurobrachia bachei