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Phylum Cnidaria (Coelenterates) Jellies Anemones Corals Hydroids.

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Presentation on theme: "Phylum Cnidaria (Coelenterates) Jellies Anemones Corals Hydroids."— Presentation transcript:

1 Phylum Cnidaria (Coelenterates) Jellies Anemones Corals Hydroids

2 Hydroids (2) & Hydrocorals (2) Hydroids- usually colonial, skeleton looks branchy like a fern, individual polyps are attached to branches. Complex life cycle. Hydrocorals- colonial, marine hydrozoans with a limestone skeleton. (resemble true corals).

3 Christmas Tree Hydroid

4 Portuguese Man-Of-War Hydroid Dangerous nematocysts-dont touch and dont try to pull one off of your friend (youll get stung too!)

5 Branching (Encrusting) Fire Coral Hydrocoral Dont touch…these are one reason to be thankful youll be wearing a wetsuit!

6 Blade (Leafy) Fire Coral Hydrocoral

7 Jellyfish (2) True Jellyfishes- translucent, unattached medusae, swim in open water, consist of prominent dome and nemotocyst-bearing tentacles

8 Sea Thimble Jellyfish Tiny and numerous! We may see these in Andros, but they only sting your mucus membranes, so you can touch them with your hands!

9 Upside-down (Cassiopea) Jellyfish Blend in well, look in warm shallows May be coin to pancake size

10 Gorgonians (8) Gorgonians- commonly called soft corals, lack rigid, permanent skeletons. Central core is surrounded by gelatinous rind with imbedded polyps.

11 Corky Sea Fingers Gorgonian

12 Black Sea Rods Gorgonian

13 Porous Sea Rods Gorgonian Picture showing pore-like polyps on right

14 Bipinnate Sea Plume Gorgonian

15 Yellow Sea Whip Gorgonian

16 Angular Sea Whip Gorgonian Commonly seen on our snorkels. Picture below shows details of polyps.

17 Common Sea Fan Gorgonian Ones we see will have purple colored veins.

18 Venus Sea Fan Gorgonian Notice yellow colored veins on the sea fans on the left.

19 Anemones (4) Anemones- solitary polyps attached to bottom of sea, lack hard skeletal parts. Tentacles with nematocysts sting and capture prey which is then inserted into mouth on oral disc. May contract tentacles for protection.

20 Giant (aka: Pink-Tipped) You will probably see these, especially during our invertebrate walk. Usually pretty small (1-3 in)

21 Sun Anemone

22 Elegant (Burrowing) Anemone

23 Corkscrew Anemone Look for these attached to patch reef or wreckage

24 Zoanthids (2) Zoanthids- similar to anemones, but tiny (<1/2 in.) and mostly colonial. Only has 2 rings of tentacles.

25 Mat Zoanthids

26 White Encrusting Zoanthid

27 Corals (13) Stony Corals- hard corals, reef builders. Polyps secreting calcium carbonate to form hard cups (corallites) that protect soft bodies. Increase in size by asexual budding. NOTE: When snorkeling over a coral head, look for combinations of stony coral, gorgonians, anemones and other organisms all living together.

28 Staghorn Coral You will see these often on the main reef!

29 Elkhorn Coral Ginormous! These have made a comeback around Andros~you should see lots!

30 Finger (Clubbed-finger) Coral Commonly seen on our trip. Look for the large wall of finger coral by the oceanic blue hole

31 Pillar Coral

32 Great Star Coral Smaller picture shows individual polyps

33 Boulder Star Coral

34 Elliptical Star Coral

35 Golfball Coral

36 Mustard Hill Coral You should see these nearly every day.

37 Symmetrical (Smooth) Brain Coral

38 Grooved Brain Coral

39 Rose Coral Elliptical on left Hemispherical on right

40 Lettuce Coral

41 The End Study your field guides and feel free to access this PowerPoint for review purposes on the Marine Biology website!

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