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The " smallbelly catshark " ( " Apristurus indicus " ) is a catshark of the family Scyliorhinidae found in the western Indian Ocean near Somalia , the Gulf of Aden , and Oman , at depths between 1,300 and 1,840 m .
 Indian Ocean, Somalia, Gulf of Aden, Oman
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:
 Indian Ocean, Somalia, Gulf of Aden, Oman