Factoid:
General names in Ireland: Piast, pooka, peist, ollpheist, water horse, and dovarchu or anchu, which mean "water dog" and may also mean otter.
| Name of Animal (if any) | Body of Water | Country or Region |
Description | Date(s) |
| Lough Dubh | On the River Suck(!), Ireland | Not a long-necked Nessie type; Instead has "short thick legs with small ears and a white pointed horn on the snout. It was dark grey in colour, and covered with bristles or short hair, like a pig." Became agressive after hooked by fishermen. | 1956, 1960, 1962 | |
| Lough Clevaun | Ireland | |||
| Lower Lough Bray | Ireland | In the mountains south of Dublin, the lake has deep waters stained by peat. The monster is reported to have a humped back with dark grey skin and a swan-like head and neck. | 3 June 1963 | |
| Lough Major | County Monaghan, Ireland | Maned serpent with 2 horns | late July 1963 | |
| Lough Abisdealy | Ireland | |||
| Lough Inagh | in Connemara, Ireland | Maned serpent | 1897 | |
| Glendarry Lough | Achill Island, Ireland | Described as anywhere from 8 to 40 feet long, with a thick tail and dark brown skin. Typical plesiosaur description. Alleged photo is probably a hoax. | 1933, 1938, 1966 May & June 1968, | |
| Lough Fadda | Ireland | Black animal with a long curved neck. Despite numerous reports, divers, dragging and depth-charges failed to bring out a monster. | 1954, 1966, 1968, 1969 | |
| River Liffey | Ireland | Sightings in the river before its valley was flooded for a Dublin resevoir | ||
| Coole Lake | Ireland | |||
| Sraheens Lough | Ireland | Described as a dinosaur that moves like a kangaroo when seen on land. Blamed for the disappearence of local sheep. Dark-brown skin and a swan-neck. The lake itself is probably an extinct volcano. | 1930's, 1966, 1969 | |
| Achill Sound | Ireland | Reportedly eats sheep | ||
| Lough Fadda | Connacht province, Ireland | 1954 | ||
| Lough Neagh | Northern Ireland | 1933, 1960's | ||
| Drumsnatt in Monaghan | Ireland | Described as an upturned-boat shape | ancient | |
| Lough Graney | Ireland | giant eel-like | ||
| Lough Dunmanway | Ireland | ~10' long serpent | 1963 | |
| Lough Ree | River Shannon, Ireland | Documented sighting by 3 priests 18 May 1960 | 300 BC, 600 AD, 1950, 1960 | |
| Lough Muck | Ireland | large eyes, humps | 1934 (none in more recent years) | |
| Lough Bran (formerly Brin) | Head of Blackwater River, Ireland | The loch is 1 mile long, 1/2 mile wide and 35 fathoms deep in places. | 1893, 1940, Dec 1954, 1960's | |
| Lough Nahanagan | Ireland | Probably only folklore | ||
| Lake Poul na Gurrum (Lough Abilsblealy) | Ireland | snake-like undulating loops, up to 25 feet long | ~1864, Jan 1914 | |
| Searrach Uisge ("Water Colt") | Loch Suainbhal | Leurbost village, Parish of Lochs, Lewis Island, Scotland, UK | Locals threw lambs into the loch to appease the monster for many decades. Described as eel-like 40 ft long. Once ate a blanket left on the beach by a shepherd girl! | 1821, Apr/Mar 1856 |
| Stronsay Island | Orkney Islands, Scotland, UK | large, unknown carcass washed ashore | 1808 | |
| Lough Crolan | Ireland | 1961 | ||
| Lough Allen | Ireland | |||
| Lough Mask | Ireland | black in color | 1674 | |
| Lough Derg ("The Red Lake") | Ireland | Name of the lake comes from an ancient tale of a lake monster being slain here. | ancient to present | |
| Lough Nahooin | Ireland | Animal with 2 humps, ~12' long, pole-like neck and head ~1' in diameter, slick skin, very flexible, flat tail | 22 Feb 1968, at sunset |