What are 3 traits that all echinoderms have in common?
The phylum Echinodermata’s defining characteristics are: 1. a water vascular system with tube feet (instead of blood they use water) 2. pentamerous radial symmetry (seastars, sea cucumbers, urchins even sand dollars are divided into 5 parts. 3. calcium carbonate ossicles (echinoderm means spiny skin) 4. mutable connective tissue (why seastars become rigid when you hold them) BACK TO ECHINODERM INDEX OR ANSWER FILE Sea Cucumber Reproduction – received on from Kornelia in Hungary Q: How does the reproduction of sea cucumbers happen? A: Sea cucumbers have an interesting way of reproducing. Depending on the species, they can either reproduce by fission (where they get cut in half/cut themselves in half and grow into two new sea cucumbers), or by sexual reproduction. The sexual reproduction isn’t really clear either though, because some of them have the ability to change from males into females. In the first year of their lives only the males are sexually mature, then after the second year,
