There are several insects referred to as "daddy long legs", but all of them are insects, which are arthropods, which is a group of Ecdysozoa, which are creatures which shed exoskeletons.
The star fish is an echinoderm, which is a group of Deuterostomia, which are creatures whose first holes during development are their anuses. So starfish are more closely related to human beings than they are to daddy long legs.
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