[4] The patterns of teeth shearing on dirt and earthworms (their main diet) set both subspecies apart from similar species.

[4] Coast moles eat insects and other small invertebrates including earthworms, which it hunts in moderately moist soil environments.

Coast mole populations and their corresponding tunnel systems seem to be larger in areas with damp soil and high earthworm densities.

Eimer's organ is a small, densely innervated sensory structure found in the nose of most talpid moles, including the coast mole, which seems to play a critical role in tactile discrimination and enables it to differentiate between prey items in an environment with little to no visual input.

Moles and monotremes appear to have developed this as a convergent structure, using common components of mammalian skin to maximize tactile sensitivity.

[6] Air supply in coast mole tunnels may be short on oxygen, but enriched with carbon dioxide from respiration.