They actually do jump when spooked especially when they are first introduced into a new tank. A trick to ensure that they do well in a tank, have a variety of food from live, frozen and dried, add a dose or two of preventive medication like Ocean free O herbal for a week if you have recently introduced them into a tank and lastly, keep the water clean. nearly forgot, they need some plants like feathergrass or cabomba near the surface, floating plants with long trailing roots also help.
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