Oct 2-08 - Cnidarians Lecture

Oct 2-08 - Cnidarians Lecture - Josh Bovard Biology 111...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Josh Bovard Biology 111 – Thursday, October 2 nd , 2008 Professor Donald Kramer C NIDARIANS Phylogeny/Origin : Scyphozoans – jelly fish Important predators of fish larvae and zooplankton Food for leatherback turtles Some have nematocysts strong enough to sting humans Anthozoans Sea anemones ‘flower animals’ Many species are symbiotic with other small fish They can touch the tentacles without causing the nematocysts discharging Coral Polyps Secrete CaCO 3 , creating an ‘exoskeleton’ forming massive reefs Symbiotic relationship with dinoflagellates Hydrozoans – hydra, no medusa stage, glide : Diploplastic Have a mesoglea in between the ecto- and endo-derms Are polyps or medusa Polyps have the opening at the top (sea anemone) Medusa have the opening at the bottom (jellyfish) Some species may alternate being forms during their life cycle Feeding : Predators that capture food using
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Oct 2-08 - Cnidarians Lecture - Josh Bovard Biology 111...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online