Violetta prolongata (English spelling)

...It feeds on siphonojellyfish such as the porcupine jellyfish, and is eaten by blue-spotted sea slugs. The closely related blue-spotted jellyfish, Violetta prolongata (= Janthina globosa ), is similar to this species, but has a spherical shell. It is oviparous, laying many egg sacs under the swim bladder secreted from its feet. ...

*Some of the terminology that mentions "Violetta prolongata" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ギンカクラゲなどのクダクラゲ類を食べ，アオミノウミウシに食われる。近縁のルリガイVioletta prolongata(＝Janthina globosa)はこの種に似るが，球状の殻をもつ。卵生で足から分泌した浮袋の下に卵囊を多く産みつける。…

※「Violetta prolongata」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報