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.
Crayfish are oviparous animals. After mating, the female keeps the eggs in the swimmerets near her tail, located under the abdomen. When the eggs hatch, the tiny baby crayfish stay on the mother's tail until they are big enough to swim independently. They eat tiny bits of food that are floating in the water.