Answer to Puzzle Contest:

Crustacean. The series represents signs of the zodiac, in month-by-month order, starting with Aquarius in late January. To conveniently quote Andrew Silikovitz from West Orange, NJ:

"Water is Aquarius, fish is Pisces, male sheep is ram (Aries), male bovine is bull (Taurus), born at same time is twins (Gemini), and crustacean is crab (Cancer)"

Winner: Amanda Purcell

Contest Statistics: Newsletter sent to 302217 subscribers, 58 answers submitted, 50 answers correct, 86.21% accuracy. Chance of a correct answer winning: 2.00%.