Mudflat Habitats

Characteristics Low energy areas – sheltered Made up of sand, mud, clay, detritus that has been deposited there Sediment – high organic content Often appear barren – a lot of life is under the sediment

What type of animals live here? Marine Worms – Burrow Mollusks – Burrow down into the sediment – using muscular foot Migratory Birds

Marine Worms

Segmented Worms Phylum Annelida Class Polychaeta – Body consists of a series of similar compartments segments – Gut goes through all segments and lies in the cavity known as the coelom

Phylum Annelida – segmented worms Includes earthworm, leeches, marine polychaetes (bristle worms) Body divided into ring-like segments Thousands of species

Phylum Annelida – segmented worms Coelom – fluid-filled body space – between digestive tube and body wall

Phylum Annelida – segmented worms More developed organ systems: – Digestive system – Nervous system – Circulatory system With hemoglobin to carry oxygen Closed – blood in veins, arteries and capillaries

Phylum Annelida – segmented worms

Many lifestyles: - burrow - swim - sessile - live in tubes

Phylum Annelida – segmented worms feeding strategies: Parasites - attach to other organisms and feed through suckers

Phylum Annelida – segmented worms feeding strategies: Suspension feeders – trap particles floating in water feather duster worm Christmas tree worms

Phylum Annelida – segmented worms feeding strategies: Deposit feeders – eat particles that have fallen to sea floor

Phylum Annelida – segmented worms feeding strategies: Predators – use “teeth” to grab prey

Phylum Annelida – segmented worms Sandworm & Clamworm – used for bait

The following animals all belong to the same PHYLUM. What characteristics do these animals share?

Compare the three classes of mollusks in terms of body plan, defensive strategies, and feeding strategies. Objective

Complete Sheet for “Shape of Life” – Remember that you are comparing the three classes based on structures (body plan), defensive strategies, and feeding strategies

Mollusks can be divided into three CLASSES: – BIVALVES: two shells – CEPHALOPODS: head connected to foot – GASTROPODS: big foot

Mollusk Classes Reading PDF in Marine Bio folder – make a reading question guide to go along with this.

Take a look at the following video. What CLASS of mollusk are you looking at? How do you know?

Classify these mollusks! Classify these mollusks activity description – Ask Ben about this and put in directions. BIVALVEGASTROPODCEPHALOPOD IDENTIFY 4 CHARACTERISTICS UNIQUE TO EACH CLASS

STRUCTURE: USED FOR: STRUCTURE: USED FOR: STRUCTURE: USED FOR: ARE THERE ANY STRUCTURES FOUND ONLY IN BIVALVES?

Which animals below are GASTROPODS?

STRUCTURE: USED FOR: STRUCTURE: USED FOR: STRUCTURE: USED FOR: ARE THERE ANY STRUCTURES FOUND ONLY IN GASTROPODS? STRUCTURE: USED FOR: STRUCTURE: USED FOR:

Take a look at the following video. What CLASS of mollusk are you looking at? How are they able to do this?

STRUCTURE: USED FOR: STRUCTURE: USED FOR: STRUCTURE: USED FOR: STRUCTURE: USED FOR: ARE THERE ANY STRUCTURES FOUND ONLY IN CEPHALOPODS?

In losing their hard shell, cephalopods gave up a huge amount of protection. Take a look at the video and explain what they might have gained. TED TV Octopus Advantages:

Compare Bivalves, Gastropods, and Cephalopods CHARACTERISTICS

Shellfishing

Is it Legal Size?

Squid Web Quest Complete the Squid Web Quest in preparation for the Squid dissection!!!

Squid Dissection WOOO!