Page 58 - Caribbean Reef Life Demo

HYDROIDS : INVERTEBRATES
BRANCHING HYDROID (Sertularella diaphana) < 15 cm / 6 in Branchlets alternate at right angles from a single stalk. Tiny polyps are found on both sides of the branchlets.
CHRISTMAS TREE HYDROID (Pennaria disticha) < 9 cm / 3.5 in Branchlets alternate from a single stalk. White polyps on the tips of each branch and stalk. Often found in clusters.
THREAD HYDROID
(Halopteris carinata) < 15 cm / 6 in
Long thin central stalks. Tiny alternating branchlets with tiny polyps. Usually found growing in small clusters.
ALGAE HYDROID
(Thyroscyphus ramosus) < 13 cm / 5 in Thick reddish-brown central stalk. Branchlets in a single plane with alternating polyps. Often found in clusters.
FEATHER HYDROID (Gymnangium allmani) < 30 cm / 1 ft
Thin tightly spaced branchlets alternate along a dark brown central stalk. The shape resembles a tall feather.
WHITE STINGER (Macrorhynchia philippina) < 10 cm / 4 in i id stal ith onl a fe ranches. istincti el ri ht white polyps run in pairs down both stalk and branches.
133