Designer hobbiesMark Berryman finds relaxation with his koi carp

Martin Hager

 · 05.06.2026

Berryman's private home in Lymington: the yacht designer designed the 1.70 metre deep pond and garden as an evolution of his first koi home - for ...
first koi domicile - for ...
Photo: privat
British yacht designer Mark Berryman, known for the interior of the 136 metre long "Hadar", has an unusual hobby. In his self-designed garden with a Japanese flavour, he keeps koi carp, which serve as a balance to his demanding work in yacht design.

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Mark Berryman opened his own design studio in 2007 and has since worked on numerous interior projects. His most recent designs include the 66-metre project "JAS"His largest work is the interior of the 136 metre long "Hadar" (ex-"Flying Fox"), which has a 400 square metre spa area. His wife Charlotte gave him the idea of a garden pond in the old house in Lymington. Berryman originally thought of goldfish, but after the first pond was completed, koi carp were also added. Over time, it became apparent that the pond was not designed for this type of fish. The designer had always been interested in Japanese design, from architecture to garden design, but had never thought about keeping koi. After an intensive design process, the result was a pond that looked as natural as possible. The experience gained with the first pond led to concrete improvements in the second project.

Further development with a clear concept

Three years ago, the family moved into a new house. Berryman wanted to design a further development of the first pond. Observation quickly showed that koi are much easier to see when the water remains free of plants. A good filter system and excellent water quality are crucial for the health of the fish. A good pond depth stimulates the growth of the koi, which is why the new pond was 1.70 metres deep. Based on very specific ideas, Berryman took over the entire landscaping and realised a garden with a distinctly Japanese touch. He installed the final parts of the complex pond filter system himself in order to better understand the system. He describes the end result as fantastic.

Relaxation and scientific observation

After a hard week's work, Berryman can lose himself sitting by the pond. It's a completely relaxing experience where minutes seem to turn into hours. The designer has also become a bit of a scientist, checking the water quality and testing the fish for parasites and infections. "I didn't think I'd be using a microscope again when I left school," says Berryman. Caring for the koi requires regular checks and technical understanding. The complex filter system has to work perfectly to keep the fish healthy. The plant-free pond enables optimal observation of the animals and makes it easier to monitor their health.

Fascination for visitors

Friends who come into the house all fall into a kind of trance while watching the fish. One craftsman was so mesmerised that Berryman couldn't talk to him. "That was pretty funny," recalls the designer. He jokingly considers whether he should have customers come round more often, preferably when it comes to signing new contracts. The calming effect of watching the koi is evident for all visitors. The pond has become a central element of the garden and combines Berryman's passion for Japanese design with practical relaxation after work in the yacht design studio.

This article first appeared in BOOTE EXCLUSIV 1/2021 and has been updated for this online version.


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Martin Hager

Martin Hager

Editor in Chief YACHT

Martin Hager is editor-in-chief of the titles YACHT and BOOTE EXCLUSIV and has been working for Delius Klasing Verlag for 20 years. He was born in Heidelberg in 1978 and started sailing at the age of six, in an Opti of course. This was soon followed by 420s, Sprinta Sport and 470s, which he also sailed on the regatta course with his brother. His parents regularly took him on charter trips through the Greek and Balearic Islands. Even at a young age, it was clear to him that he wanted to turn his passion for water sports into a career. After graduating from high school and completing an internship at the Rathje boatbuilding company in Kiel, it was clear that he did not want to become a classic boatbuilder. Instead, he successfully studied shipbuilding and marine engineering in the Schleswig-Holstein state capital and focused on yacht design wherever he could. His diploma thesis dealt with the “Testing of a new speed prediction method for sailing yachts”. In 2004, the superyacht magazine BOOTE EXCLUSIV was looking for an editor with technical and nautical background knowledge, a position that was perfect for Martin Hager. The application was successful and a two-year traineeship was arranged. After twelve years as an editor, the editorial team changed and he took over responsibility for BOOTE EXCLUSIV as editor-in-chief in 2017. After long-time YACHT editor-in-chief Jochen Rieker moved to the role of publisher, Martin Hager also took over the position of editor-in-chief of Europe's largest sailing magazine YACHT, which is celebrating its 120th anniversary this year, at the beginning of 2023. When he's not working on topics for the two water sports titles, Martin Hager likes to go out on the water himself - preferably with kite and wingfoil equipment or on a little after-work trip across the Alster.

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