plankton organisms that drift with the currents. zooplankton animal plankton – many different...

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Plankton • Organisms that drift with the currents

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Plankton

• Organisms that drift with the currents

Zooplankton

• Animal plankton – many different types

• Heterotrophic – primary consumers

Zooplankton

• Major type – copepods– Small crustacean

Plankton-

Copepods

Zooplankton

• Holoplankton– Spend their entire life in plankton

Zooplankton

• Meroplankton– Only found in plankton for part of their life

cycle– Larvae of benthic adults

Meroplankton

Animal Kingdom

• Classify similar animals into Phyla

• 36 Animal Phyla – Only 1 has vertebrates

Invertebrates

• Animals without backbones

• No internal rigid skeleton

• Softbodied

• Many have hard external coverings

Phylum Porifera

Phylum Cnidaria

Phylum Cnidaria -

CORAL

Phylum Annelida

Phylum Arthropoda - Crustaceans

• Crabs, lobster, shrimp, barnacles, copepods

Phylum Arthropoda

Class Crustacea

Phylum Mollusca

• 3 Main groups– Gastropods - snails– Bivalves- oysters, clams, mussels– Cephalopods – octopuses, squids

Gastropods

• Spiral shells

• Shell-less = sea slugs or nudibranchs

• Project head and muscular foot when moving

Phylum

Mollusca

Bivalves

• Twin, hinged shells

• not very mobile

• Suspension feeders

• Gills for gas exchange

Phylum

Mollusca

Cephalopods

• Largest of the invertebrates (59 ft squid)

• Foot modified into tentacles

• Active predators

• Highly evolved nervous system

Phylum Mollusca – Class Cephalopoda- CUTTLEFISH

Phylum

Mollusca

Phylum Echinodermata

• Sea stars, sand dollars, brittle stars, sea urchins

Phylum

Echinodermata