The venomous fish family that includes rabbitfishes with venomous fin spines is Siganidae.
Siganidae is the family of rabbitfishes, also called spinefoots. Its only living genus is Siganus, whose species inhabit shallow marine waters across the Indo-Pacific and, following introductions through the Suez Canal, parts of the eastern Mediterranean.
Rabbitfishes possess venomous spines in their dorsal and pelvic fins; many accounts also describe venomous anal-fin spines. The spines are connected to well-developed venom glands, and a puncture can be intensely painful, although it is generally not considered medically significant for healthy adults. Some rabbitfish venoms contain toxins similar to those of stonefish.
The family is easy to confuse with other spiny marine-fish groups, but rabbitfish anatomy is distinctive. Their pelvic fins have two spines and three soft rays, and their small, beak-like teeth suit a largely algae-based diet. Siganidae was formally described as a family in 1837, while Siganus dates to 1775.