Here you can find a lot of coral models, at all it is around 79 units. Package include pregathered groups of corals and self illumination textures for night sea bottom.
Triangle counts:
Coral 11 - 1300 tris
Coral 12 - 3300 tris
Coral 21 - 1700 tris
Coral 31 - 370 tris
Coral 32 - 460 tris
Coral 41 - 3050 tris
Coral 42 - 1800 tris
Coral 51 - 2100 tris
Coral 52 - 1450 tris
Coral 61 - 900 tris
Coral 71 - 650 tris
Coral 81 - 1560 tris
Coral 91 - 1750 tris
Coral 92 - 900 tris
Coral 93 - 2150 tris
Coral 131 - 1400 tris
Coral 132 - 860 tris
Coral 133 - 670 tris
Coral 141 - 4 tris
Coral 142 - 4 tris
Coral 143 - 4 tris
Coral 144 - 4 tris
Coral 151 - 2700 tris
Coral 152 - 3100 tris
Coral 153 - 650 tris
Coral 161 - 1300 tris
Coral 162 - 2300 tris
Coral 171 - 18 tris
Coral 17_2 - 18 tris
Seaweed - 128 tris