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Growth rate of the sand shrimp,Crangon septemspinosa, in Rhode Island waters is directly proportional to water temperature. For individuals 20–30 mm long, growth is less than 0.4 mm/week during the winter (average water temperature 5 C) and greater than 1.1 mm/week during the summer (20 C). Smaller shrimp (20–30 mm) grow faster than larger shrimp (40–50 mm). Linear relationships between length and weight aré derived.