The problem MARINE FISH DETECTION AND SOIL MOISTURE MONITORING solves

Rather than employing people to monitor the amount of fish accumulation in marine and rural water bodies, this device can swim in the layers of water using propellers. The fish detection is done using Sonar Technology which gives us the image indicating the presence of fish in a small cliff typed symbol. And can efficiently move on lands with the help of same propellers which use a Fiber Bragg grating optic sensor to detect the amount of moisture in the cultivated lands and can send a notification message when the moisture content hits below the specified cut-in value.

Challenges I ran into

i) Moisture damageable sensor components.
ii) Detection of anomalous on the water with sonar.
iii) The weight of the final product.
iv) Lose connectivity in the midway.