Instead of one single mouth, they have several smaller mouth openings in their oral arms, which are used to feed on zooplankton.
12.
An "'Oral arm "'is an anatomical structure of " true " sea jellies ( or Scyphozoans ), which belong to the class Scyphozoa.
13.
In moon jellies, the eggs lodge in pits on the oral arms, which form a temporary brood chamber for the developing planula larvae.
14.
The tentacles vary with the age of the individual, consisting typically of eight marginal long dark arms, and four central frilly oral arms.
15.
The tentacles vary with the age of the individual, consisting typically of eight marginal long dark arms, and four central, frilly, oral arms.
16.
The bell is separated from the dangling oral arms and both are washed in seawater before being scraped to remove the gonads and mucus.
17.
The "'Semaeostomeae "'( literally " flag mouths " ) are an order of large jellyfish characterized by four long, frilly oral arms flanking their quadrate mouths.
18.
"Pelagia ", like other jellyfish in the scyphozoan order Semaeostomeae are mainly distinguished from the other orders by having simple oral arms with frilled or folded lips.
19.
The manubrium is a stalk-like structure hanging down from the centre of the underside, often surrounded by oral arms, which connects with the mouth / anus at the base of the bell.
20.
The nematocysts are located throughout the tentacles that radiate downward from the edge of the umbrella dome, and also cover the four or eight oral arms that hang down from the central mouth.
