Sharks

The initial design sketches are as simple as logos; I'd draw a couple of shapes based on logo references to get the basic round structure. Which I'd then add little bits of detail that are taken from other references.

Facts about Sharks :
Sharks as as I knew from TV have an amazing sense of smell and eyesight, but upon further reading, I found out that they have electroreceptors.

This means that they have the ability to detect electromagnetic fields which are generated by muscle movements. This helps them be deadly accurate when homing in on its target as well as allowing them to find prey that's hidden underneath the sand.