Mensa Prize Puzzle Competition - June 2022

Enter this month’s competition for a chance to win a set of Mensa branded Absolutely Authentic Mensa test cards. A must for anyone who enjoys testing their logical thought process to the limit! For a chance of winning, submit your answer to the following question. We will pick two correct entries after the closing date.
Closing Date: 30th June 2022
Find words to fit the clues, all the words end in the same three letters.
What are the words?
_ _ _ _ _ _ _ A marine creature
_ _ _ _ _ _ _ A small mat
_ _ _ _ _ _ _ Part of a book
Show AnswerLobster, coaster and chapter.