Aglantha perform regular "fishing" cycles, swimming up with tentacles contracted, and floating down with tentacles extended. The upward orientation of the swimming phase depends on input from the statocysts. In a 2-m tall tank, Aglantha showed a migration pattern toward the surface during the day and away at night. Slow swimming in Aglantha involves graded, nonpropagative muscle responses. Input from the tentacles is excitatory, and from conducting epithelia inhibitory to slow swimming. The nervous pathways mediating slow swimming are distinct from the giant axons mediating fast (escape) swimming described in earlier papers. There is no protective "crumpling" response.
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G. O. Mackie (1980) studied this question.