Without its usual crowd of spectators, Kaikyokan’s sunfish essentially started to fall into a deep-sea depression.

A lonely sunfish has been given cardboard human friends by staff at an aquarium in Japan to help improve its mental health.

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A SUNFISH that was literally dying of loneliness has been saved with a group of cardboard cutouts friends keeping it company.

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Staff members believe the sunfish stopped eating when the aquarium was temporarily closed because it was lonely.