Module 4: Marine Invertebrates 1 – Part 1

Mangroves are found along the coastal lands of the tropics and sub-tropics.  North of Tampa, Florida the mangroves disappear to marshlands along the coast.  Like the salt water marsh plants, mangroves are salt-tolerant plants but cannot tolerate frost like the marsh plants.  There are three types of mangroves, the white, the black and the red.

We have studied marine organisms from the first four kingdoms in creation.  Kingdom Animalia contains the largest number of species on our planet.  This kingdom is split into two major subgroups:  invertebrates and vertebrates.  Invertebrates are animals that do not possess a backbone. 90% of all the animals on earth are invertebrates.  From this group insects make up the largest population of invertebrates.

In our lab, Microscopic Observation of a Sponge we observed the shape of spicules of a Vase Sponge and a Deadman Fingers Sponge.  The spicules form the “skeleton” of the larger sponges, supporting them so they stand upright in the water.  Spicules are made up of calcium carbonate or silica. In order to classify sponges, a marine biologist often looks at the sponge’s unique spicule shape rather than looking at a sponge’s overall appearance. Refer to Figure 4.2 on page 78 that shows a closeup of various cells.  A sponge’s collar cell  are located inside the canals of a sponge’s body.  These cells have a flagellum that move to create currents of water which flow into the sponge that carry along and trap food particles contained in the water. The collar cell can then ingest the food it collects.  Further note Figure 4.3 that diagrams the 3 body types of a sponge, namely; Ascon, Sycon, and Leucon.

October 11, 2912 PowerPoint Honors Marine Biology Oct 11 Mod 3 Mangroves and Mod 4


  1. Read pages 87 – 93
  2. Answer OYO questions 4.5 – 4.11
  3. Study Guide Questions:  define m – q   questions: 12 – 22.
  4. Finish Lab books
  5. Quiz:  Know the 3 species of Mangroves.    What is a Spicula on a sponge?   Define a collar cell on a sponge.
  6. Class Challenge :  Crazy Hair Day

Have a great week! -Mrs. S

This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s