Complete set of 12 shapes formed by this puzzle's black squares

Question:

Answer:

PENTOMINOES

Length:

Similar Crossword Questions:

How this puzzle's black squares are arranged
On hold ... or what the seven rows of black squares in this puzzle's grid spell in Morse code
Web concerns ... and based on six familiar names hidden in rows 1, 4, 12 and 15 of this puzzle grid, what the black squares in those rows symbolize
Like aleph in the central black squares of this puzzle's grid
Row of black squares preceding or following six puzzle answers, thereby completing them
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Request that will complete the show's puzzle
The 2x2 black square near the middle of this puzzle's grid, e.g., which is part of eight answers