Alderia modesta

Krug, RJ. and Manzi, A.E., Waterborne and surface-associated carbohydrates as settlement cues for larvae of the specialists marine herbivore Alderia modesta, Biol. Bull., 197, 94, 1999. 

Several studies now point to the importance of carbohydrates as settlement cues. Many species of coral larvae that settle on crustose coralline algae metamorphose in response to an algal cell wall polysaccharide.17132 The sacoglossan Alderia modesta metamorphoses in response to carbohydrates of different size classes from its algal food Vaucheria longicaulis.144 The sea urchin Holopneustes purpurascens metamorphoses in response to a complex of the sugar floridoside and isethionic acid from the red alga Delisea pule hr a.11 In this case, the combination of compounds was important because neither induced metamorphosis alone. 

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