Small, aquatic robots that resemble jellyfish. They can be encountered in the underwater sections of Bubble Man's realm in Mega Man 2. These mechanoids always travel in groups and home in on intruders using sonar scans. They attack by rending their targets to pieces with their spinning blades at close range. However, even in large numbers, Hydroids aren't much of a threat because of the ease in which they can be destroyed.
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