What marine animal resembles a horse wrapped with rings of bony armor?

Seahorse

"Madagascar" features what species are the main characters Alex, Marty, Melman, and Gloria? What murder-solving board game includes Professor Plum and Miss Scarlet as characters? What famous American poet wrote the poem 'A Visit from St. Nicholas' commonly known as 'The Night Before Christmas'? Who introduced the Gregorian calendar in 1582? Who holds the record for the longest field goal in NFL history?