User blog comment:The Sponge House/How Would You Make Linc Or Swim A Better Episode?/@comment-1650307-20180408061809/@comment-1650307-20180410061426

According to Wikipedia: A bikini is usually a women's abbreviated two-piece swimsuit with a bra top for the chest and underwear cut below the navel. The basic design is simple: two triangles of fabric on top cover the woman's breasts and two triangles of fabric on the bottom cover the groin in front and the buttocks in back.

While Leni does have a bra top, she also has a skirt instead of the underwear cut like Lori has.

I am sorry if this description was a bit "graphic" for this site that kids probably go on, but I needed to describe a "bikini" that the description on Wikipedia is the most formal.