Estuarine fish are at their breeding peak right now, when eggs and larvae are…

June 29, 2026Southern New England Coastal Plains and Hills

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Estuarine fish are at their breeding peak right now, when eggs and larvae are most vulnerable — but they face stacked pressures that make survival harder each year. The Passaic Valley Sewerage Commission has exceeded its permitted limits for suspended solids two quarters running, pushing 40% above the ceiling just as low-oxygen stress begins to set in across the estuary. Organic loading (measured as oxygen demand) is up 72% as well.

The Hudson-Raritan estuary was once the richest fishery on the Northeast coast — a place of such abundance that its decline marks the transformation of the entire region. Each violation at this moment, during breeding season in these shallow, tide-dependent nurseries, is a small measure of how far recovery has yet to go.

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