Which of the following animals undergo aestivation?

In animals, the organism, if unable to migrate, might avoid the stress by escaping in time. Bears going into hibernation during winter is an example of escape in time. Some snails and fish go into aestivation to avoid summer-related problems-heat and desiccation. Under unfavourable conditions, many zooplankton species in lakes and ponds are known to enter diapause, a stage of suspended development.