Simplify the following text for a Grade 14 native English-speaking person.
Original: Tunicates are more closely related to craniates ( including hagfish , lampreys , and jawed vertebrates ) than to lancelets , echinoderms , hemichordates , Xenoturbella or other invertebrates .
Simplified: Tunicates are more closely related to craniates ( hagfish , lampreys , jawed vertebrates ) than to lancelets , echinoderms , hemichordates , or other invertebrates .