▁can ▁detect ▁light ▁and ▁dark . ▁After ▁met am orph osis ▁from ▁the ▁am m oco ete ▁into ▁the ▁ju ven ile ▁stage , ▁the ▁lamp rey ▁becomes ▁a ▁golden ▁color ▁with ▁yellow - ting ed ▁fins . ▁Te eth ▁( o ften ▁used ▁to ▁identify ▁lamp rey ▁to ▁species ) ▁develop ▁on ▁the ▁or al ▁disk , ▁and ▁the ▁eyes ▁develop ▁from ▁the ▁eye ▁sp ots ▁at ▁met am orph osis . ▁Le ast ▁bro ok ▁lamp rey ▁do ▁not ▁have ▁a ▁ju ven ile ▁period ▁( see ▁life ▁cycle ), ▁and ▁m atur ation ▁continues ▁directly ▁into ▁the ▁adult ▁stage , ▁at ▁which ▁point ▁the ▁body ▁sw ells ▁as ▁the ▁g on ads ▁are ▁developed . ▁Pop ulations ▁are ▁likely ▁phys ically ▁distinct ▁depending ▁on ▁the ▁local ity ▁where ▁they ▁are ▁captured . ▁Therefore , ▁the ▁physical ▁description ▁provided ▁here in ▁is ▁only ▁a ▁general ▁description . ▁Instead , ▁the ▁to oth ▁arrang ements ▁in ▁adult s , ▁which ▁do ▁not ▁vary ▁as ▁much ▁between ▁populations , ▁should ▁be ▁used ▁to ▁identify ▁this ▁species ▁posit ively . ▁Am m oco etes ▁should ▁be ▁tent atively ▁identified ▁based ▁on ▁prior ▁collection ▁history ▁for ▁the ▁area ▁in ▁which ▁they ▁were ▁found ▁unless ▁they ▁are ▁posit ively ▁identified ▁by ▁an ▁expert . ▁ ▁Life ▁Cy cle ▁ ▁Ad ult s ▁spawn ▁in ▁the ▁spring ▁in ▁the ▁head w aters ▁of ▁streams . ▁The ▁males ▁( a ided ▁by ▁females ) ▁construct ▁small ▁n ests ▁by ▁pick ing ▁up ▁p eb bles ▁with ▁their ▁or