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One species , " Todarodes pacificus " , has been observed spreading tentacles in a flat fan shape with a mucus film between the individual tentacles while another , " Sepioteuthis sepioidea " , has been observed putting the tentacles in a circular arrangement .
 Todarodes pacificus, Sepioteuthis sepioidea
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Todarodes pacificus, Sepioteuthis sepioidea