New research finds that warm-bodied marine predators, including great white sharks and tuna, burn nearly four times more energy than cold-blooded species, a metabolic premium that becomes increasingly costly as ocean temperatures rise. Unlike cold-blooded fish that passively match ambient water temperature, these species generate internal heat to sustain speed and predatory performance, but that same physiology limits their ability to shed excess warmth. As sea temperatures climb, the gap between their internal heat load and safe operating thresholds narrows sharply. The compounding problem is nutritional: warmer oceans are disrupting prey availability, meaning these predators must eat more precisely when food is harder to find. Researchers frame this as a 'double jeopardy' dynamic, where thermal stress and caloric shortfall reinforce each other. Population-level consequences for apex predators would ripple through marine food webs, with downstream effects on commercial fisheries and the broader ocean ecosystems that underpin them. Migration range compression is a plausible near-term stress signal to monitor.
Pakistan's Indus Waters Commissioner warned at an Islamabad seminar that India's suspension of treaty obligations threatens water security for 240 million people.
The US conducted a second straight night of strikes against Iran after an Iranian drone hit a commercial vessel in the Strait of Hormuz on Saturday. The back-to-back military operation raises the risk of disruption to a waterway carrying roughly 20 percent of global oil supply.
Iran has attacked Kuwait and Bahrain in retaliation for US strikes, drawing two key Gulf US allies into the conflict. The escalation puts a reported US-Iran deal under serious strain and raises energy supply risk in a major oil-producing region.
Iran's Revolutionary Guards have warned that oil tankers crossing the Strait of Hormuz without authorisation risk being stopped, even as one tanker proceeded through the waterway. The threat could push up war-risk insurance premiums and crude prices, with major importers like India directly exposed.
