Cushion starfish is a catch-all term for a variety of starfish species. They are distinctive for their rounded bodies and short arms. The round shape is built on a calcium-rich structure that defends ...

Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. These starfish are not abundant, which is probably a good ...

Add Yahoo as a preferred source to see more of our stories on Google. Square-shaped starfish are usually cushion starfish, whose rounded, inflated bodies can appear angular in rare cases. Unusual ...

With a large variety of starfish in the ocean, there are many unique appearances that can be surprising. One example is the cushion starfish. These marine animals are famous for their inflated bodies ...