Highly hydrophilic materials enable rapid water delivery and salt redissolution in solar-driven seawater desalination.However,the lack of independent floatability inhibits heat localization at the air/water interface.In nature,seaweeds with internal gas microvesicles can float near the sea surface to ensure photosynthesis.Here,we have developed a seaweed-inspired,independently floatable,but superhy-drophilic(SIFS)solar evaporator.It needs no extra floatation support and can simultaneously achieve continuous water pumping and heat concentration.The evaporator resists salt accumulation,oil pollu-tion,microbial corrosion,and protein adsorption.Densely packed hollow glass microbeads promote intrinsic floatability and heat insulation.Superhydrophilic zwitterionic sulfobetaine hydrogel provides a continuous water supply,redissolves the deposited salt,and endows the SIFS evaporator with excellent anti-fouling properties.With its unprecedented anti-contamination ability,this SIFS evaporator is expected to open a new avenue for designing floatable superhydrophilic materials and solving real-world issues of solar steam generation in complex environmental conditions.