Andhra Pradesh and Tamil Nadu

Pulicat Lake, straddling the Andhra Pradesh–Tamil Nadu border, is India's second-largest brackish-water lake after Chilika, formed as a coastal lagoon separated from the Bay of Bengal by the barrier island of Sriharikota (itself notable as the site of India's main satellite launch centre, ISRO's Satish Dhawan Space Centre — a frequently tested "which lake's barrier island hosts India's rocket launches" cross-reference). It is an important habitat for migratory flamingos and other waterbirds and carries protected-area status through the Pulicat Lake Bird Sanctuary.

Memory hook: "Pulicat is second only to Chilika, and its barrier island launches India's rockets." One lake, one superlative, one surprising cross-reference to lock it in.

Practice Recall: Before reading on, name India's second-largest brackish-water lake and the barrier island that separates it from the sea.

Answer: Pulicat Lake; Sriharikota Island.

Pulicat's ecosystem, like Chilika's, mixes seawater entering through a narrow tidal mouth with freshwater draining in from small rivers and creeks, producing the same salinity gradient that defines a lagoon. It supports a substantial artisanal fishing economy for communities on both the Andhra Pradesh and Tamil Nadu sides of the border, and its flamingo congregations, concentrated especially at the southern end near the Tamil Nadu border, are frequently featured in the same current-affairs coverage that discusses Chilika's and Sambhar's winter waterfowl arrivals — a useful reminder that India's three largest saline/brackish water bodies (Chilika, Sambhar, Pulicat) are all major stops on the same broader migratory bird calendar, even though they differ in salinity type, formation, and state.