Baltimore City Department of Public Works crews were dispatched to the Inner Harbor area this morning to address a grim sight: a swath of dead fish blanketing the water near the Maryland Science Center. The phenomenon stretched beyond the science center, a sight unfamiliar to residents frequenting the famous waterfront. A local passerby stated, as per WBAL-TV, that despite her daily walks by the harbor, she had never encountered such an occurrence.
The exact cause of this aquatic casualty was initially unclear, eliciting concerns and questions from the community. Crews continued their collection efforts, plucking the deceased fish from their brackish grave, and an investigation was set in motion.
Adam Lindquist, vice president of an environmental initiative with stakes in the harbor's wellbeing, attributed the die-off to a naturally occurring phenomenon known as the "pistachio tide." In a statement reported by WMAR-2 News, Lindquist explained that recent cooler air temperatures had caused denser surface water to sink below the warmer water, resulting in an inversion.
This process disrupted the water's stratification and resurrected sulfur bacteria that lay dormant in the depths. When these bacteria are brought to the surface and exposed to sunlight, they generate hydrogen sulfide, presenting a bright green color in the water. Tragically, the low oxygen conditions born from this inversion are lethal to fish, leading to the casualties now being removed from the harbor's waters.
The Department of Public Works has not yet estimated the number or species of fish affected by the event. However, continual updates are anticipated as the cleanup operation progresses.
