The Sea Inside

Meanwhile those same ships bring back invasive species on befouled hulls or in their ballast, Japanese seaweeds and Manila clams; to marine biologists, this is probably the most ‘alien’ estuary in Britain, with new organisms arriving every year.
In the nearby National Oceanographic Centre – an oddly industrial-looking complex itself, mounted with telecommunication masts, and flanked by long refrigerated sheds that contain sample cores of the earth’s archival depths, every three metres representing one hundred million years

There’s a determined, discretionary air to their epicene foraging, although actually they’ll eat almost anything. They seem surprised if you stop and look at them, as though no one had bothered to do so before. They stare back briefly, abashed, then turn away, unable to believe that anyone other than their own might find them interesting. Or perhaps there is disdainful pride in that sideways glance, assuming the reverse: that they are the most intelligent of all birds.

Every so often the crows will rise up in waves, bird-shaped holes in the sky. They’re a lustrous lack of colour, denuded of detail; a fluttering negation, as dark as the night.

These monogamous animals have complex social structures and can reach forty years or more, the longest-living wading bird.

the Eurasian oystercatcher eats mostly mussels and cockles teased from the shore, using its greatest asset: a bone-strengthened bill, part hammer, part chisel, able to prise open the biggest bivalves. Delicately coloured carrot-red to toucan-yellow – it might be made of porcelain – it is a surprisingly sensitive probe. At its tip are specialised Herbst corpuscles that allow the bird to sense its prey by touch as well as sight; an oystercatcher can forage as well by night as by day.

grebe parents will pluck out their own feathers to feed their chicks, lining their young stomachs against fish bones.

eye-dazzling camouflage for First World War soldiers and ships, mimicking natural cover in an industrial war. A grebe’s markings, intensely detailed against the grey of the sea, may seem darkly obvious to us, but from below, its white throat and breast renders it invisible, able to deal death with its stiletto bill. Thayer called this disguise ‘counter-shading’; it lends animals from birds to whales a flat deception in the overhead sun, making them seem insubstantial rather than solid things.

That fixity of sea and sky is a supreme deception. Over it lies what Herman Melville called the ocean’s skin – a permeable membrane, one-sixteenth of a millimetre thick, fertile with particles and micro-organisms and contaminants; a fantastically fragile yet vast division.

follow the same route. I’ve been doing it so long that my bike could steer itself to its destination. Its tyres know every crack in the tarmac, every worn-out white line, every pothole. The urgency of my mission leaves the sleeping houses behind. I ride like my mother walked, at a furious pace, always trying to keep up with myself. As though, if I went fast enough, no one would see me.