Aristotle was the first to assign humans with 5 traditional senses viz. sight, hearing, touch, taste, and smell, but nowadays several animals also possess additional perceptive abilities
Spiders
It possesses unique organs called slit sensilla that can judge size, and weight of prey and sense minute mechanical strains on their exoskeleton
Comb Jellies
It has sensory receptors called statocysts that allow them to balance themselves and Ocelli that allow this eyeless animals to sense light and dark without creating a complex image
Pigeons
Its sixth sense is called magnetoreception viz. using beak structures for precise navigation
Dolphins
It uses echolocation as its sixth sense to create 3D Maps with sound waves for hunting and socializing
Sharks
Its sixth sense is known as Electroreception which is the ability to detect electrical fields for efficient predatory skills
Salmon
this animal uses magnetoreception to find home rivers and to recognize scents for navigation
Bats
Echolocation, geomagnetic sense, and polarization vision are used by bats to navigate and sense surroundings
Mantis Shrimp
It has unique sense related to polarization that is used to detect and communicate with other mantis shrimp using linear polarized light, even in ultraviolet and green wavelengths
Weather Loaches orWeatherfish
It can detect pressure changes including buoyancy and weather prediction
Platypus
It has 40,000 electroreceptor cells in its bill, used by it for precise navigation
Sea Turtles
It can navigate with its geomagnetic sense and biological clock or "third eye" sense, allowing them to navigate back to their home