The following photos are from Visuals Unlimited. An instructor using a Thomson Learning textbook has...

The following photos are from Visuals Unlimited. An instructor using a Thomson Learning textbook has the right to use these photos for the duration of the adoption in the classroom or on instructor’s course website so long as the credit specified here is visible on or under the photo at all

times, and images are displayed at no larger than ¼ screen at 72 dpi. Instructors do not become the owners of these

photos and do not have the right to grant permission to third parties to use this material. See the ReadMe for details.

A group of Star Coral polyps feeding.

Credit: © Marty Snyderman38051

Purple Tube Sponge.

Credit: © Hal Beral97245

Hydra littoralis, a multicellular, freshwater organism which attaches to submerged leaves, rocks or twigs. It uses its tentacles to capture prey that passes by. SEM X27.

Credit: © Dr. Stanley Flegler228394

Bleached Coral (Pocilloporo elegans), Cabo San Lucas. Mexico, caused by El Nino conditions.

Credit: © Daniel Gotshall228918

Sponge on a coral reef.

Credit: © James Watt280119

Nematocyst (ejected tubule) from a tentacle of the Box Jellyfish (Carybdea alata). SEM X600.

Credit: © Dr. Dennis Kunkel284703

Sea Gooseberry Comb Jelly with commensal hyperiid Amphipods.

Credit: © David Wrobel301456

Sea Nettle Jellyfish (Class Scyphozoa).

Credit: © David Wrobel301458

Obelia, a marine colonial hydrozoan showing reproductive polyps and feeding polyps. LM X28.

Credit: © Dr. David Phillips902013

Released nematocysts (ejected tubules) from the tentacle of a Box Jellyfish (Carybdea alata). SEM X140.

Credit: © Dr. Dennis Kunkel284701