Every monsoon, thousands of seashells wash up on Karachi's shores. Here's why

Every June and July, thousands of seashells wash up on Karachi's beaches during the monsoon season. Marine experts attribute this to upwelling, where monsoon winds draw cold, oxygen-depleted water from the deep ocean, killing bottom-dwelling shellfish like clams. Fishermen confirm this recurring phenomenon, noting it has occurred for decades along Karachi's coastline.