''Manania gwilliami'' is a species of

stalked jellyfish Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and m ...

found in

intertidal The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species ...

and

subtidal The neritic zone (or sublittoral zone) is the relatively shallow part of the ocean above the drop-off of the continental shelf, approximately in depth. From the point of view of marine biology it forms a relatively stable and well-illuminated ...

zones on the west coast of North America. The stalk (peduncle) is described as being as long or longer than the

calyx Calyx or calyce (plural "calyces"), from the Latin ''calix'' which itself comes from the Ancient Greek ''κάλυξ'' (''kálux'') meaning "husk" or "pod", may refer to: Biology * Calyx (anatomy), collective name for several cup-like structures ...

; the calyx typically has mottled pigmentation throughout. The name "''gwilliami''" refers to

G.F. Gwilliam GF, gf or gF may refer to: Arts and entertainment * GuitarFreaks, a music video game series * Ground Floor, an American comedy series created by Bill Lawrence and Greg Malins * '' Gravity Falls'', a Disney TV show Businesses and organizations A ...

who described a number of

stauromedusae Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and me ...

in the mid-20th century.

References

Haliclystidae {{Staurozoa-stub