Phylum Porifera the sponges

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Phylum Porifera - the sponges
Local sponges
Red volcano sponge Acarnus erithacus
Tropical Vase sponge
Sulphur sponge Verongia aurea
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Phylum Cnidaria - hydroids, anenomes, corals,
jellyfish, gorgonians
Orange gorgonian Adelogorgia phyllosclera
Giant green anenome Anthopleura xanthogrammica

• Cnidarians can have 2 forms
• Polyps (benthic)
• Medusae (planktonic)
• The thing they all have in common are
  cnidoblasts stinging cells

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Cnidarians Medusa form
Sea wasp (lethal)
Moon jelly
Portuguese man-of-war
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Corals Colonial cnidarians
Coral polyps at night
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Phylum Ctenophora
Beroe
Pleurobrachia (sea gooseberry)
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Phylum Annelida - segmented worms Class
Polychaeta - bristled worms
Tomopteris (a planktonic polychaete worm)
Feather-duster worm Eudistylia polymorpha
Sand-castle worm Phragmatopoma californica
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Phylum Chaetognatha Arrow worms
These fierce predators are well adapted to living
in the plankton
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Phylum Mollusca Class Gastropoda I Chitons and
limpets
Conspicuous chitons Stenoplax conspicua
Fingered limpets Collisella digitalis
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Phylum Mollusca Class Gastropoda II Snails and
slugs
Black sea hare Aplysia vaccaria
Gray periwinkles Littorina planaxis
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Phylum Mollusca Class Bivalvia Clams, oysters,
and mussels
Bean clams Donax gouldii
California mussels Mytilus californianus
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Phylum Mollusca Class Cephalapoda Squids and
octopuses
Market squid Loligo opalescens
Two-spotted octopus Octopus bimaculoides
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Phylum Arthropoda Class Crustacea Shrimp and crabs
Striped shore crab Pachygrapsus crassipes
Hermit crab Pagurus samuelis
Coon striped shrimp Pandalus danae
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Phylum Arthropoda Class Crustacea barnacles
Acorn barnacle Balanus glandula
Goose-necked barnacles Pollicipes polymeris
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Phylum Arthropoda Class Crustacea isopods
Rock louse - Ligia Occidentalis
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Phylum Arthropoda, Class Crustacea, Subclass
Copepoda
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Phylum Arthropoda, Class Crustacea, Order
Euphausiacea (euphausiids)
Both of these species are called krill
Euphausia superba
Meganyctiphanes norvegica
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Phylum Echinodermata Seastars and brittle stars
Smooth brittle star Ophioplocus esmarki
Leather star Dermasterias imbricata
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Phylum Echinodermata Urchins and Sand Dollars
Sand dollar Dendraster excentricus
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Phylum Echinodermata Sea Cucumbers
Warty sea cucumber Parastichopus parvimensis
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Phylum Chordata
Wooly sculpin Clinocottus analis
Lobed tunicate Cystodytes lobata
California sea lion Zalophus californianus
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Many animal phyla have planktonic representatives
Chordata
Chaetognatha
Arthropoda
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Many animal phyla have planktonic representatives
Mollusca (pteropod)
Cnidaria
Annelida (tomopteras worm)
Ctenophora
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Test Your Knowledge
Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?
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Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?
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Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?
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Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?
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Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?
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Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?
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Which phylum Porifera, Cnidaria, Mollusca,
Arthropoda, Echinodermata, or Chordata?