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Other amphibians , such as the Dornier Seastar use stub wings called sponsons , mounted with their own lower surfaces nearly even with the ventral " boat-hull " shaped fuselage surface to provide the needed stability , while floatplane amphibians usually avoid the problem by dividing their buoyancy requirements between two floats , much like a catamaran .
 Dornier Seastar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Dornier Seastar