Reported about 1 year ago
A netizen discovered dark green bones while eating swordfish, prompting others to explain that certain fish species release bile pigments into their body tissues, causing their bones to exhibit a unique green color. This phenomenon is also seen in saury, garfish, and three-lips species, not due to contamination or quality issues but as a natural distinct feature of marine organisms. The green bones are safe to eat, as confirmed by experts responding to the concerned netizen's query shared on social media.
Source: YAHOO