Wordspiral

1. Notion 2. Opera song 3. Prayer ending 4. Body part 5. Potter’s oven 6. Standard 7. Take care of 8. Foolish 9. Story 10. Needle case 11. Wading bird 12. Not hard 13. Sound a horn 14. Tense 15. Ruffian 16. Swallow eagerly

Starting from 1, fill in the grid in a clockwise direction with four-letter words. The last letter of each word becomes the first letter of the next word. If you have correctly filled in the grid there should be a seven-letter key word reading across from 8. KEYWORD CLUE: Marine mammal