Uni Flash

In manga, unifura ウニフラ, or "uni flash," uni furasshu ウニフラッシュ, is flash of light with a black outline that looks like a "sea urchin," uni 雲丹.

The uni flash is drawn like the beta flash, using focus lines, except that instead of a black background they're placed on just any background.

Typically, they're used as speech balloons, or rather, as thought balloons.

Manga: Zatch Bell!, Konjiki no Gash!! 金色のガッシュ!! (Chapter 5, 道具か人間か！？)

• Examples
• References

Examples

For reference, some examples:

Manga: Prison School, 監獄学園 (Chapter 168)

• Context: a girl is conflicted.
• n? nanda.. kono kimochi wa..
  ん？なんだ･･この気持ちは･･
  Hm? What is it.. this feeling..
  • In my chest..??!!

Manga: Gabriel DropOut, ガヴリールドロップアウト (Chapter 24)

• Context: a character is walking around when all of sudden this girl shows up and...
• chotto okane kashite kurenai?
  ちょっとお金貸してくれない？
  Won't [you] lend [me] a little money?
• nandesuka kono hito!?
  なんですかこの人！？
  What's [up with] this [girl]!?
  • She just asked money from a complete stranger!

Manga: Zatch Bell!, Konjiki no Gash!! 金色のガッシュ!! (Chapter 5, 道具か人間か！？)

• Context: the antagonist made a mistake. Takamine Kiyomaro 高嶺清麿, grinning, comments on it.
• he...
  へ･･･
  Heh...
• zamaa miro...
  ざまあみろ…
  • [It servers you right...]
  • Expression used toward someone when they make a mistake.
• kono kuso yarou...
  このクソ野郎･･･
  [You piece of shit]...
  

References

• ウニフラッシュ - tonbi.jp, accessed 2020-03-31.
• ウニフラ - dic.pixiv.net, accessed 2020-03-31.