Nature.

"Omnis vita ex mare" (all life has it´s origin in the sea).
‍
The biosphere at Búðir is rich and versatile, whereas the difference between high tide and low tide can be up to 6 meters. There is quite a lot of kelp (sweet kombu, kombu royale) in the shallow sea, along with other types of seaweed. By the Hnausar shore Atlantic Wakame is quite common, and it's taste is similar to the purple seaweed dulse (söl). One seaweed type is considered to be a delicassy, but it is the seaweed truffle. It is like a tenant of the cystic seaweed, which is it´s host and as the name seaweed truffle refers to it has the taste of truffles.
These are all edible seaweed and are safe to harvest in various seasons. All these species are in the biosphere of Búðir. Seaweed is mainly in 3 categories: Brown seaweed, Red seaweed and Green seaweed.

For further information of using, preservation and food preparing of edible seaweed I would like to refer to the good book „Íslenskir Matþörungar (Ofurfæða úr fjörunni)“. Sögur útgáfa 2020. Authors: Eydís Mary Jónsdóttir geographer and environmental scientist, Hinrik Carl Eggertsson chef, Silja Dögg Gunnarsdóttir historian and Karl Petersson photographer.
 
The shallow sea and the sea close to the beach, with it's vast sandy bottom is the habitat for various types of fish. The sea by sandy beaches is an important habitat for various types of flatfish in theyr first year. It is also likely that similar habitats further off the beach are an important growing area, after the young fish seeks from the shore to deeper territories.

On a warm sunny day you can enjoy the life on the seashore at Búðir. The sand warms up in the sun and ejects some warmth to the shallow sea when tide begins to come in. When wading bare footed in the sand you can often feel a tickle under your feet from some small fish, often sole or halibut as they rush to get away. It is very easy for adults to find the child within you under these circumstances and fall into youth games. When the tide is getting lower small pools form, and they can be full of life. Rock gunnel, sole and halibut sils, crabs, sea urchins and cruciferous fish often appear there. On the clifts down and west off Vopnalág there are pools that never disappear. This was a popular playground for children, with myself included, and we tried to fish some hornbills, as the pools are packed with it. Grown ups have to keep a good look out for the children over there, as the cliffs stand only a few meters from the sea level, and the fall down is dangerous. 

Plentiful fishing sites are close to Búðir and it is needless to go too far to get to good fishing spots. The catch is mainly cod, occasional haddock, and pollock, and in certain seasons it is possible to catch some herring and mackerel. In the Bryggjuós outlet some sea trout and arctic char are seen, and it was caught in the early days. There is quite a lot of sandworm under the sand surface, and fishermen used to dig like a feet down to get the worm. It was a good bait. Mussels were also used for bait.

There are various other types of shells in the biosphere of Búðir, like mussels, artica islandica (kúfskel), horse mussels (öðuskel), white cup seashell (báruskel) and sand shell (soft-shell clam). The soft-shell clam is found around 1 feet under the sand surface, and is considered to be in some amount at the sandy beaches of Búðir. Also there is somewhat of small marine snails. 

The bird life is quite versatile. At the outlet from the bay between Búðir and Kvíabryggja many types can be spotted, and it is a unique experience to watch the birds gather. For instance in may when spring is breaking in you can often see enormous groups of birds. In the bay outlet it is common to see eider, terns, purple sandpiper, euratian oystercatcher, seagulls, great black-backed gull, northern fulmar, shag and other seabirds. Also a lot of birds are seen wide along the coast line, for instance at Búðatangi, in Franskavík, in Karlsvík, outside the rocks out off the house ruins of Búðir, and in Bjarkarvík. 
‍
It is spectacular to watch the sea by the lighthouse (Grundarfjarðarviti), and if you are lucky, then you can maybe spot some whales who often are seeking food in the fjord. Further off the coast puffins are in great numbers. The puffins lay theyr eggs in Melrakkaey, and theyr main food is sea-eel. When there is much sea-eel, greater sand-eel, herring or mackerel, the northern gannets are sometimes spotted plunging like arrows to catch the fish.
‍
All of the birds seek this fish and the whales often appear for this feast. The whale types are mostly harbour porpoise, dolphins and minke whale, but occasional humpback whales can be spotted. Then there is also the orcars who often come catching herring and mackerel. In 2013 there were hundreds of orcas in Grundarfjörður and Kolgrafarfjörður, and never have so many eagles been spotted at the same time.
‍
In Kolgrafarfjörður a number of seals came when the fjord was packed with herring, and it was interesting to watch how well they tried to stay away from the orcas. The orcas are not the friendliest creatures to the seals.
‍
In mount Kirkjufell a few birds lay theyr eggs, like seagulls, great black-backed gull and northern fulmar. Down in the moor and the fields many birds have theyr nests. You can often see in the land of Búðir and high in or by Kirkjufell a frequent eagle. The young birds who have not reached fertility often come there in the late winter and spring. The main food choice of eagles is eider, and if you spot a flock of eider in the sea, and an eagle approaches, the scene looks like a boiling pot, where the eider hurries to get away.

On the 18th of may 1990 the law on fisheries management in Icelandic waters was enforced. Before this law, the farms by the sea were legally allowed to fish and harvest whatever the sea provided. To try to win this back theyr ancient rights, an organisation of owners of sea farms (www.ses.is) was established. SES has been pursuing a litigation on the Icelandic authorities on behalf of the sea farms owners to reclaim theyr rightful status. This was taken from them quite suddenly.

The human rights court of Europe has come to the conclusion of the indisputable property rights of sea farms, as it is also protected by the constitution. This has not yet been accepted by the Icelandic authorities, and it will be interesting to see what comes out of this in the future.
‍
The property borders of sea farms go all the way as 115 meters from where the dry land reaches the sea  when the tide is low in a "high tide" season, but this is called "Netlög" ("net-layings").