1. Kristina Moskalenko

2. Reproduce in water.  Reproduce like fish.  Release thousands of eggs into the water.  The male then fertilizes them.  Out of the eggs larvae will emerge which will then grow and develop into adults.  Sexually.  Has both sets of sexual organs.  Female and male.  Release gametes.

3. Both fertilize internally and externally depending on the species.  While it grows the space inside expands.  The shell is stretched away from the embryo.  The membrane is clearly visible.  One axis of the egg is twice as long as the other side.  The long axis if parallel to the egg shell.  Each starfish arm contains two gonads that release gametes.  Fertilization is usually external but in some species it’s internal.  The buoyant eggs and sperm are released into the water.  Most embryos of a starfish hatch at blastula stage.

4.  Takes a week to develop from fertilization to hatching.  They float neither at the bottom or at the top, but in the middle of the vast environment.  Because they hatch fast it is hard to find an egg.  A hatching is called a paralarvae.  The difference between a hatchling and an adult is that a hatchling doesn’t have a proboscis.  Normal larvae go through cataclysmic metamorphosis which octopuses and squids don’t go through.  Most embryos hatch at blastula stage.  Which later develops a lateral pouch, archenteron.  Entrance to this is known as the blastopore and it will later develop into the anus.  A band of cilia develops on the exterior.  At this stage the larvae is known as bipinnaria.  The next stage in development is a brachiolaria larva and involves the growth of three short, additional arms.  Metamorphosis now takes place with a radical rearrangement of tissues.

5.  Both mom and dad take good care.  Die not long after reproduction.  The mother will care for the sac and will not eat anything until she mate.  The mother might die before or after the egg hatches leaving it free to swim.  Many species of starfish expel many eggs and sperms into the ocean, and fertilize them externally.  Then the larvae travels many miles by being swept away by the currents for two months.  As they develop, the tiny larvae swim in the sea and eat phytoplankton.  Starfish do not have brain therefore do not have the knowledge to care for the young.

6.  http://wiki.answers.com/Q/How_does_a_starfis h_care_for_it's_young?#slide=1  http://wiki.answers.com/Q/How_can_an_octop us_take_care_of_its_young?#slide=1  http://en.wikipedia.org/wiki/Starfish  http://wiki.answers.com/Q/How_do_squid_repr oduce?#slide=1  http://hermes.mbl.edu/publications/pub_archiv e/books/Brooks/