▁located ▁close ▁to ▁the ▁Rub ha ▁Be ag ▁head land ▁at ▁the ▁north ▁west ▁end ▁of ▁the ▁bay . ▁▁ ▁There ▁is ▁evidence ▁that ▁Sal mon ▁fish ing ▁has ▁occurred ▁in ▁Cu il ▁Bay ▁for ▁some ▁ 4 0 0 ▁years , ▁which ▁is ▁important ▁for ▁Scotland ▁her itage . ▁The ▁main ▁species ▁of ▁Sal mon ▁f ished ▁is ▁the ▁Sal mo ▁sal ar . ▁The ▁fish ing ▁technique ▁uses ▁a ▁fixed ▁engine ▁bag , ▁which ▁is ▁a ▁trap ▁for ▁fish , ▁were ▁a ▁leader ▁runs ▁into ▁two ▁or ▁three ▁other ▁ch amb ers , ▁where ▁the ▁fish ▁are ▁tra pped . ▁This ▁is ▁both ▁an ▁ancient ▁and ▁environment ally ▁health y ▁way ▁to ▁fish , ▁as ▁fish ▁can ▁be ▁kept ▁or ▁released ▁depending ▁on ▁size , ▁weight ▁and ▁condition . ▁Lang oust ine ▁and ▁pra wn ▁are ▁also ▁f ished ▁by ▁pot ▁in ▁the ▁same ▁spot . ▁ ▁Bi ology ▁ ▁Cu il ▁bay ▁is ▁known ▁for ▁the ▁providing ▁the ▁ideal ▁bi ology ▁for ▁the ▁giant ▁t ach in id ▁fly ▁which ▁res emb les ▁a ▁b umble be e ▁in ▁flight . ▁The ▁large ▁amount ▁of ▁dry ▁open ▁me adows , ▁and ▁he ath s ▁which ▁surr ound ▁the ▁bay , ▁make ▁for ▁ideal ▁bre eding ▁grounds . ▁It ▁bre eds ▁from ▁February ▁until ▁ ▁September ▁and ▁is ▁a ▁par as ite ▁of ▁large ▁c ater p ill ars . ▁ ▁Conserv ation ▁design ations ▁Cu il ▁bay ▁is ▁part ▁of ▁one ▁S ites ▁of ▁Special ▁Scient ific ▁Interest , ▁and