- Male amphipods attach themselves to females in order to transfer their reproductive fluids directly into the genitals of the females. Many species accomplish this by grasping the females between their legs.
- Females carry the eggs in pouches under their thorax (the section connecting the head to the abdomen), which is an extension of their walking legs. The eggs are unattached to each other. They incubate in this chamber from seven to 21 days.
- Juvenile amphipods look like the adults after hatching. They leave the chamber within a week after hatching, right after the female sheds her exoskeleton.
- Amphipods have a wide range of diets, depending on the species. Some species eat plants, where others are predators and feed on small animals. Still others are scavengers, feeding off the dead skin of larger animals.
- Adults range from 3/16 of an inch to ¾ of an inch long. Most species live only one year, only reproducing once during their lifetime. The species Hyalella azteca is able to have 15 sets of young within a five-month period.
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