The non-predatory Kern Brook Lamprey has not been extensively studied and identified because of a limited and scattered distribution. They appear similar to the Western Brook Lamprey in both appearance and life history. Kern Brook Lampreys tend to occupy slow backwaters of foothill streams. Ammocoetes burrow themselves into the soft silt or sandy substrate in the margins of runs or pools. Favorable conditions includes substrate depths of 30-110 cm and water temperatures that rarely exceed 25°C. Biologists presume that the Kern Brook Lamprey undergoes metamorphosis in fall and then spawns in gravelly substrate in the spring before dying.
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