1 The posterior pituitary lobe releases two hormones that are produced in the hypothalamus:  Oxytocin, which is responsible for stimulation of milk ejection (milk letdown) and for stimulation of uterine smooth muscle contraction at birth.
Crayfish and crawfish are crustaceans living in freshwater with a great resemblance of the lobsters. However, their size is smaller compared to the lobsters.
The common crayfish (crawfish) lives about 2 or 3 years, but individuals may live to be as old as 8 years. Some rare species can live as long as 20 years. After reaching 2 yeaâ¦rs of age, they have usually grown fairly large and have difficulty creating larger shells beyond a certain size.