Exploring the myriad medusae of Valentia

Another Life:   The commissioning of the Celtic Explorer as Ireland's new national research vessel marks a coming of age of …

Another Life:  The commissioning of the Celtic Explorer as Ireland's new national research vessel marks a coming of age of Ireland's marine science, write Michael Viney.

The ship's impressive, hi-tech presence at the quay in the heart of Galway connects us with the life of the deep ocean at a wholly new level of seriousness. When the Marine Institute moves into its new and glamorous research headquarters above the bay, it can look across the Atlantic to the famous Woods Hole Oceanographic Institute, in Massachusetts, with every hope of matching its ambitions.

By a nice coincidence, next weekend sees a happening on Valentia Island, Co Kerry, that reaches back a century to one of the most compelling personal stories in the history of Irish marine biology. On Friday, Saturday and Sunday, from 3 p.m. to 7 p.m., in the old Church of Ireland in Knightstown, a video starting every hour will celebrate the indomitable spirit of Maude Delap, who died in that parish in 1953.

Medusae is the work of artist Dorothy Cross (who set the luminescent Ghost Ship afloat in Dún Laoghaire Harbour a few years ago) and her marine biologist brother, Tom, Professor of Zoology at NUI, Cork. Together, they have spent three years exploring the life, dreams and accomplishments of an extraordinary amateur naturalist. Their radio programme about her, Jellyfish, was broadcast on BBC Radio 3, and the first part of Medusae, called Come Into The Garden Maude , was projected on to an outside wall of the Royal National Theatre in London. The Easter screening on Valentia brings their collaboration back to its source.

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Maude's life is a striking cameo of the Victorian Protestant subculture in Ireland and its enthusiasm for the study of nature. She was born at Templecrone, Co Donegal, in 1866, as the seventh of 10 children of a Church of Ireland rector, Alexander Delap, himself a keen naturalist.

Appointed rector of Valentia in 1874 (a parish that included the lightkeepers of the Skelligs), he sailed the family's belongings down the coast in his own boat, while his wife, Anna Jane, and the children travelled overland. What little money there was went to educate the four boys, and Maude spent the rest of her life in the house at Reenellen, with two unmarried sisters.

The Delap family's early observations, sent to the Irish Naturalist, helped to attract to the island, in 1895, a team of English marine scientists. As a contribution to their study, Maude and her sister Constance rowed a currach beneath the high cliffs, trawling for plankton species with a fine net.

She also fell in love with one of the young biologists (unrequitedly, as it turned out, but they corresponded for 40 years and she sent him wild violets on his birthdays).

Maude continued to dispatch specimens to the Natural History Museum in Dublin, including strange fish caught by trawlers, a new species of sea anemone and the skull of the rare True's beaked whale that she had rotted down in her asparagus bed. But her real contribution to marine biology arrived when she began breeding jellyfish in bubbling belljars of sea-water in the rectory, in a room that soon took on the distinctive smell of low tide.

By rearing mature jellyfish from their "infant" stages as hydra fixed to the sea-bed or as planktonic larvae, she was able to show for several species which young form belonged to which adult, free-swimming medusa - a considerable contribution for its time.

The slow conjuring of full-grown jellyfish (compass, moon jellies, the wonderful blue Cyanea lamarcki ) from tiny eggs, blobs or planktonic whirligigs has inspired Dorothy Cross's dreamlike video sequences, in which fragments of Maude Delap's life drift and dissolve like the medusae themselves.

Her fascination, as an artist, with the mysteries of Maude Delap's life interweaves with her brother's exploration of the living mechanics of jellyfish, in particular the deadly tropical species Chironex fleckeri, or box jellyfish.

Tom and Dorothy made two trips to North Queensland, Australia, for fieldwork and filming of the species. In the past century, its toxic sting has killed three times as many Australians as have died from shark attack, and Tom Cross's portrait of the beast as a sharp-eyed predator, using its transparency as an effective camouflage, does much to upset my image of jellyfish as indifferent drifters.

Maude Delap, a heroine at the margins of Irish cultural history, waits for a TV docu-drama. That long-shot of the sisters rowing beneath the cliffs; her face like a mermaid's among the bell jars; Maude picking violets for Mr Browne's birthday and then, near the end, selling arum lilies from the rectory garden to add to the tiny honorarium from the Natural History Museum.