Black Brothers

The Black Brothers (ブラックブラザーズ), are three brother scorpion-like creatures developed by Dr. Indigo using the chemical SIQ for Shiki's plot to use monstrous animals to attack East Blue to force the World Government to submit to him.

A trio of stingers, each brother has a different appearance from each other.

They are seen in One Piece Film: Strong World chasing Luffy and being chased by a Fat Lion. The animals are defeated by Billy later.

Big Sasori
Big Sasori (巨大サソリ) is the eldest son of the three brothers. Working in conjunction with his brothers he soundly brings down his prey. He is dark red in appearance.

Second and Third Brothers
The second son is characterized by his sharp form, pincers, and stringer. Using his sharp pincers he tears his opponents to pieces. He is dark purple in appearance.

The third son has on his single tail two stingers. He overpowers by using his thick and heavy build. He is dark green in appearance.

Translation and Dub Issues
Big Sasori's name comes from the Japanese word, 蠍/さそり/sasori, which means scorpion.