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.
Community Q&A. Crayfish, also known as crawfish, crawdads, and mudbugs, are lovable crustaceans that make excellent pets. All you need to take care of one is the right tank, ample food, and more than a bit of love and time.