Scotland a territorial parish structure, with every community in Scotland having a local congregation. Scotland also has a significant Roman Catholic population, 19% professing that faith, particularly in Greater Glasgow and the north-west. After the Reformation, Roman Catholicism in Scotland continued in the Highlands and some western islands like Uist and Barra, and it was strengthened during the 19th century by immigration from Ireland. Other Christian denominations in Scotland include the Free Church of Scotland, and various other Presbyterian offshoots. Scotland's third largest church is the Scottish Episcopal Church. Islam is the largest non-Christian religion (estimated at around 75,000, which is
Largest organisms shorter than some other echinoderms. The longest echinoderm known is the conspicuous sea cucumber "Synapta maculata", with a slender body that can extend up to . In comparison, the biggest sea star is the brisingid sea star "Midgardia xandaros", reaching a span of , despite being quite slender. "Evasterias echinosoma" is another giant echinoderm and can measure up to across and weigh . The largest nemertean is the bootlace worm, "Lineus longissimus". A specimen found washed ashore on a beach in St. Andrews, Scotland in 1864 was recorded at a length of . Both the largest mollusks and the largest