Complex sentence: It grows up to about 7.2 cm in length and is characterized by "lollipop-like" white knobs on the second dorsal fin of the male that develops during the breeding season.
Split into simpler sentences: It grows up to about 7.2 cm in length. It is characterized by "lollipop-like" white knobs on the second dorsal fin of the male that develop during the breeding season.