Cannibalism is reported here for the first time in the hydrothermal vent crab Xenograpsus testudinatus , an endemic species inhabiting sulfur-rich shallow vent ecosystems. We examined how food deprivation and population density influence cannibalistic behavior under controlled laboratory conditions. Size-matched crabs were maintained at three initial densities (low: 15; medium: 45 (control group); high: 90 individuals per tank...

Introduction Coral reefs are highly productive marine ecosystems that support biodiversity, nutrient cycling, and coastal protection. Thermal stress associated with ocean warming threatens coral physiology by disrupting metabolism, antioxidant defenses, and tissue integrity. Tubastraea aurea , a stony coral with fleshy polyps and a calcareous skeleton, was investigated to determine how increasing temperature affects biochemica...