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.
A crawfish (also known as a crayfish) is a fresh-water crustacean  that looks like and is closely related to a very small lobster.  Their scientific name is Astacoidea and aâ¦re in the Astacoidea and  Parastacoidea superfamilies.