Psychrolutidae (commonly known as marine sculpins, flathead sculpins, blobfishes, or tadpole sculpins) is a family of sculpins found in cool temperate waters throughout the Northern Hemisphere, with a few species ranging into cold and deep waters of the Southern Hemisphere. The vast majority are found in marine habitats, but a few range into freshwater habitats. The family reaches its greatest diversity in the North Pacific Ocean, but a few species are found as far south as Antarctica. The family contains over 216 recognized species in 63 genera. Their name is derived from the Greek psychrolouteo, meaning "to have a cold bath".

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