Little one

S tarfish don’t have any blood to transport nutrients around their bodies. So they have to use something else as a replacement. What is it?

Solve the crossword, then read down the shaded square to find the prize answer.

ACROSS

1 Timepiece you wear on your wrist (5) 4 Place a stake (3) 6 Smart …, proverbial know-it-all (4) 7 Rocks containing metal deposits (3)

DOWN

1 Spider’s trap (3) 2 Name of a book or movie, perhaps (5) 3 Break out of an egg (5) 5 Listening organ (3)