" ▁are ▁often ▁used ▁arbitr arily ▁or ▁inter change ably . ▁Bl u em ull ▁Sound ▁for ▁example , ▁is ▁very ▁similar ▁to ▁some ▁of ▁the ▁f irth s ▁in ▁the ▁Sh et land ▁Islands . ▁ ▁English ▁f irth s ▁ ▁Sol way ▁F irth ▁( in let ▁with ▁the ▁rivers ▁E den , ▁E sk ▁and ▁N ith ). ▁The ▁F irth ▁is ▁off ▁the ▁Sol way ▁Coast . ▁Places : ▁Carl is le , ▁England ▁on ▁the ▁River ▁E den , ▁Ann an ▁and ▁G ret na , ▁both ▁in ▁Scotland . ▁Lu ce ▁Bay , ▁W igt own , ▁St ▁Be es , ▁Asp at ria ▁ ▁F irth s ▁outside ▁Britain ▁ ▁Fl ens burg ▁F irth , ▁an ▁est u ary ▁forming ▁part ▁of ▁the ▁border ▁between ▁Den mark ▁and ▁Germany ▁The ▁F irth ▁of ▁Th ames ▁is ▁a ▁bay ▁at ▁the ▁mouth ▁of ▁the ▁W ai hou ▁River ▁( former ly ▁named ▁the ▁Th ames ) ▁in ▁New ▁Zealand ▁ ▁F irth ▁of ▁T ay , ▁Ant arct ica . ▁N amed ▁in ▁conj unction ▁with ▁neighbour ing ▁D und ee ▁Island , ▁as ▁the ▁original ▁F irth ▁of ▁T ay ▁ad jo ins ▁D und ee . ▁ ▁See ▁also ▁List ▁of ▁water ways ▁L och ▁F j ord ▁R ia ▁ ▁References ▁ ▁Category : Co ast al ▁and ▁ocean ic ▁land forms ▁▁▁▁ ▁F irth s ▁ ▁Category : Sc ott ish ▁words ▁and ▁phr ases <0x0A> </s> ▁S rip ur and an