Robot fish system

A robot fish system adapted to be used in a specific aquatic area, said robot fish system comprising:

• a light-emitting device adapted to be disposed in the specific aquatic area, and configured to emit a light signal in the specific aquatic area;
• and
• a robot fish configured to move in the specific aquatic area, said robot fish including
• a housing that includes a head portion, and an opaque plate extending outwardly from said head portion,
• a first light receiver that is disposed on said head portion to the left of said opaque plate when looking in a forward direction of the housing, that is exposed to an environment, and that is configured to receive the light signal emitted from said light-emitting device,
• a second light receiver that is disposed on said head portion to the right of said opaque plate when looking in the forward direction, that is exposed to the environment, and that is configured to receive the light signal emitted from said light-emitting device,
• a driving module that is disposed on said housing, and that is configured to operate in one of a random mode, a left-turn mode, a right-turn mode and a straight-moving mode for driving movement of said housing in the specific aquatic area, and
• a processor that is disposed in said housing, that is electrically connected to said first light receiver, said second light receiver and said driving module, and that is configured to perform an operation procedure including steps of:
• determining whether any one of said first light receiver and said second light receiver receives the light signal emitted from said light-emitting device,
• controlling said driving module to operate in the left-turn mode to make said robot fish turn left in the specific aquatic area when it is determined that only said first light receiver receives the light signal emitted from said light-emitting device,
• controlling said driving module to operate in the right-turn mode to make said robot fish turn right in the specific aquatic area when it is determined that only said second light receiver receives the light signal emitted from said light-emitting device,
• controlling said driving module to operate in the straight-moving mode to make said robot fish move straight in the specific aquatic area when it is determined that both said first light receiver and said second light receiver receive the light signal emitted from said light-emitting device, and
• controlling said driving module to operate in the random mode to make said robot fish move randomly in the specific aquatic area when it is determined that none of said first light receiver and said second light receiver receives the light signal emitted from said light-emitting device.