1. Cnidarians Animals with Stinging Tentacles Classes
Jelly Fish -Scyphozoa
Sea Anemone-Anthozoa
Coral-Anthozoa
Portuguese Man of War –Hydrozoa
Box jelly- Cubozoa

2. Cnidarians Two Cell layers Saclike digestive tract
Radial Symmetry-_similar parts surrounding a central axis
Lack a brain, but have a nerve net
Catch their food- they are not filter feeders
Sometimes they are attached to a substrate and sometimes they are free swimming

3. Polyp- attached to a substrate Example- corals,sea anemones, jellyfish
Cnidarians come in two forms
Polyp- attached to a substrate Example- corals,sea anemones, jellyfish
Medusa –free swimming
Example- Jellyfish

4. Cnidarians Both forms are surrounded by Tentacles
Which have Cnidoblasts-Stinging Cells with Nematocysts inside
That are used for
Protection
Catching Prey

5. Scyphozoa Jelly Fish Size- Most are 1-16 inches
Can be 1 inch to 200 feet long
Predators
Sea Turtles
Banner Fish
Arrow Crab
Snails

6. Predators of Jellyfish
Sea turtles mistake plastic bags for food

7. Banner fish eating a jellyfish

8. Arrow crab eating a jellyfish

9. Yes, this snail is eating a dead Jellyfish

10. Moon Jellyfish Most common on LI Up to 18 in. wide
Sticky to help catch prey
Circles in middle are the gonads (sex organs)
Don’t do much harm
By the time they reach the beach they are harmless because they lost their tentacles.

11. Moon Jelly

12. Moon Jelly
Moon Jellyfish, Aurelia aurita at MarineBio.org

13. Cubozoa Box Jelly
                                                                                                                                                      

14. Box Jelly Pale blue and transparent and box shape
Also called the Sea wasp
Pale blue and transparent and box shape
this jellyfish can see - 24 eyes
15 tentacles from each corner -60 tentacles
found in N. Australia. Live up to 1 year
this jellyfish swims, it does not drift
powerful venom that instantly kills its prey. Attacks the nervous system. Humans have had heart attacks or gone into shock and drown before reaching the shore. If you survive attack then you will feel pain for weeks and have scar damage.
Sea turtles eat them. Not affected by sting

15. Box Jellyfish

16. Box jelly sting Fatal sting

17. Cannonball Jelly

18. Sea Nettle Grows up to 12 feet long Reddish-maroon markings
Found in Atlantic Ocean from Massachusetts to Florida and the Gulf of Mexico. Also in Pacific from Alaska to Southern California

19. Lions Mane Largest in the world
Found in Cold Northern Waters –Atlantic Ocean from Arctic to Gulf of Mexico Also Pacific from Alaska to Southern California
Pink in color
8-200 feet long
Up to 7 ft wide
Powerful Sting- tentacles can detach and still sting for months.

20. Scuba diver with a lions mane can weigh up to 450 pounds and 6
Scuba diver with a lions mane can weigh up to 450 pounds and 6.5 ft in width

21. Jellyfish Invasion GIANT JELLYFISH PICTURES: Japan's Nomura Invasion

22. Anthozoa Corals and Sea Anemones
Polyps-attach to substrate
Called Flower Animals
They are Larger and live Alone
Corals
Polyps-attach to substrate
Called flower Animals
They are smaller and live in colonies

23. Sea Anemones and Corals
Anthozoa is a class in the phylum Cnidaria that includes the sea anemones, corals, sea pens and sea fans

24. Different types of Coral

25. Northern Coral and Rose Coral

26. Sea Fans

27. Giant Sea Anemone This Can grow up to 10 inches in diameter
They also have nematocysts
Can devour a giant crab and spit out the shell in minutes
]can compare to a human eating a whole chicken in 15 minutes
Found along Pacific coast from Alaska to Baja

28. Sea Anemone with a clownfish A Symbiotic relationship

29. Sea Anemone

30. Hydroids Portuguese man of war

31. Portuguese Man of War
Found in Pacific, Indian and North Atlantic Gulf Stream
Not a jelly because it is a colony
Body is pink or purple and translucent
Body is on top and tentacles below water
Tentacles range from feet
Sails on top of the water and is driven by Wind
Sting can be serious but usually never deadly

32. Man of Wars found in Florida

33. Comb Jellies This is Not a Jellyfish
They have eight rows of long fused cilia that look like combs.
They swim on or near surface of water
They light up when disturbed- Bioluminescent