It seems like you have a passage about starfish and their unique features, particularly related to their respiration or 'breathing' mechanisms.

To summarize, here are some key points from the passage:

1. Starfish absorb oxygen from water through different parts of their body, such as skin and tube feet.

2. Respiration occurs in two locations: on the thin skin at the ends of the tube feet and in the dermal gills or papulae.

3. The dermal gills are small projections near the base of spines, usually on the topside, and are lined with cilia that move to produce a current bringing fresh water for oxygen absorption.

4. Starfish have different numbers of sieve plates depending on their size and number of arms; larger ones can have up to 15 sieve plates.

5. The phylum Echinodermata includes about 7,000 described living species, including sea stars, sea cucumbers, sea urchins, sand dollars, and brittle stars.

Please let me know if you'd like me to help with anything else, such as extracting specific information or providing related facts!

Starfish skin gills