<Tr> <Td> Colour </Td> <Td> Often drab, brown or gray (but not always) </Td> <Td> Often boldly patterned (but not always) </Td> <Td> </Td> </Tr> <Tr> <Td> Habitat </Td> <Td> Often deep water (but not always) </Td> <Td> Often shallow water (but not always) </Td> <Td> </Td> </Tr> <P> Skates have slow growth rates and, since they mature late, low reproductive rates . As a result, skates are vulnerable to overfishing and appear to have been overfished and are suffering reduced population levels in many parts of the world . The barndoor skate, Dipturus laevis, is currently listed with the IUCN as vulnerable due to being severely overfished . </P> <P> In 2010, Greenpeace International added the barndoor skate, bottlenose skate, and maltese skate to its seafood red list . "The Greenpeace International seafood red list is a list of fish that are commonly sold in supermarkets around the world, and which have a very high risk of being sourced from unsustainable fisheries ." </P>

Where is the heart located in a skate