THE CRAYFISH

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THE CRAYFISH
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WHAT IS A CRAYFISH
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IS IT A CRAB
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IS IT A SHRIMP
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IS IT A LOBSTER
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THE CRAYFISH IS A FRESHWATER COUSIN OF THE LOBSTER
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• KINGDOM, ANIMALIA
• PHYLUM, ARTHROPODA
• CLASS, CRUSTACEA
• ORDER, DECAPODA
• FAMILY, ASTACIDAE
• GENUS, PROCAMBARUS
• SPECIES, CLARKII

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NATURAL HABITATFRESH WATER PONDS AND STREAMS

• . flooded and drained areas
• . variety of habitats
• . some drift
• . others prowl
• . some burrow
• . shelter in shells
• . under rocks

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ECOLOGICAL RELATIONSHIPS

• PREY ON WORMS, WATER INSECTS
• FISH
• PREYED ON BY FISH , BIRDS, TURTLES, AND MAN

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ANATOMY
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• Anatomy
  
• Head- eyes, antennas, antennules, rostrum, mouth
• Carapace- chelipeds, pereiopods
• Abdomen- pleopods, uropods, telson

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Internal Anatomy Open circulatory system- blood
to heart, arteries, open sinusesDigestive
system- stomach, glandAntennal gland- main
excretory organ
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LIFE CYCLE
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• Reproduction
• Mating
• Spermatophore mixes with eggs
• Fertilized eggs put in brood chamber and attach
  to pleopods
• Eggs kept clean and oxygenated
• Eggs undergo larval stages
• 40 days to hatch
• Remain in brood chamber
• Young undergo 3 larval phases to become juvenile
  crayfish

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Sexing CrayfishReproductive openingsFemale
(5)Male (6)
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• Molting
• How crayfish grow
• Process
• Vulnerable because soft exoskeleton
• Exoskeleton hardens with calcium
• Eat discarded exoskeleton

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LIFE NEEDS
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• I. Exoskeleton
• . Protection
• . Cover

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• II. Food
• . Wardly Goldfish Crumbles
• . Dog and cat food, chicken, wieners
• . plants, snails, tadpoles,fish
• . agricultural waste products

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• III. Environment
• . glass aquarium
• . gravel
• . temperature 70-80 degrees
• . some greenery
• . rocks
• . pump and filter
• . something to crawl under
• . water

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• IV. Burrowers
• . primary
• . secondary
• . tertiary

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ACTIVITIES
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CRAYFISH MASTERPIECE

• FIRST GRADE
• FOCUS To allow the children to create a crayfish
  masterpiece during an art lesson.
• MATERIALS NEEDED
• Colored Tissue Paper
• Crayfish Cutouts (provided by the teacher)
• Vinegar
• Cotton Balls
• Dixie Cups
• Copy Paper

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CRAY FISH STORY
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