Gilli 2.0.1 Reads the Water, Not Just the Weather

Gilli 2.0.1 is live.

Most fishing apps stop at the surface.

They show you the weather. Maybe a moon phase. Maybe a generic bite score. If they are better than average, they show depth contours too. That is useful, but it is still incomplete. Fish do not live in the forecast. They live in a specific body of water, with a specific shape, temperature profile, oxygen pattern, and seasonal rhythm.

That is what this release is about.

Gilli 2.0.1 adds Lake Ecology and Sea Ecology, two live views on Gilli Pro that treat your water as a working system. They read fish behaviour, surface temperature, thermal layers, wind-driven mixing, oxygenation, and bathymetry where mapped coverage exists. The read changes as you move and as conditions change.

It is a more honest way to think about fishing. Not "is today good?" but "what is this water doing, and which species does that favour?"

Lake Ecology

Freshwater is layered.

In summer, a lake can split into a warm top layer, a colder bottom layer, and a narrow band between them where oxygen and temperature are actually usable. In spring, the same lake can behave like a completely different place. Wind can mix the surface. Cloud can cool the top layer. A shallow bay can wake up before the main basin. A deep hole can hold fish that have no interest in moving.

Lake Ecology is built for that kind of reading.

It covers the freshwater species Nordic anglers actually target — pike, zander, perch, trout, char, whitefish, carp, bream, and the rest of the core profiles.

For each species, Gilli evaluates depth-zone positioning, seasonal posture, and feeding activity against the current conditions. A pike, a perch, and a whitefish can sit in the same lake on the same afternoon and still have completely different outlooks. The point is to show those differences instead of flattening everything into one cheerful score.

Sea Ecology

The sea has its own version of the same problem.

Marine fishing is full of broad rules of thumb: tide, wind direction, pressure, season. Those still matter. But they do not matter equally for every species, and they do not explain what is happening at your exact mark.

Sea Ecology covers the common North Sea and Nordic marine targets across base and extended profiles — seabass, cod, mackerel, pollack, the flatfish, the gurnards, wrasse, sea trout, and more.

The marine activity matrix runs live in production. It adapts to location, day and night conditions, and the current state of the water. The result is not a promise that fish will bite. It is a better read on which species are biologically more likely to be active.

That distinction matters.

What Gilli Reads

Gilli 2.0.1 brings together layers that anglers normally have to interpret separately:

• Species-specific behaviour profiles for all supported species
• Surface temperature, including the cooling effect of overcast skies
• Thermal stratification: the warm epilimnion, the oxygenated thermocline, and the oxygen-poor hypolimnion that fish avoid in summer
• Wind-driven mixing and aeration, which can refresh oxygen and break stratification
• Bathymetry, where mapped coverage exists

None of these inputs is magic on its own. The useful part is how they interact.

A windy day can be uncomfortable for you but helpful for the water, because mixing can refresh oxygen in the top layer. A bright calm day can look beautiful from the bank but push some fish deeper or tighter to structure. A lake with a deep central basin behaves differently from a shallow bowl, even under the same weather.

That is why a flat forecast is never enough. The shape of the water changes the meaning of the weather.

Göteborg-Region Lakes Now Have Bathymetry

Gilli ships mapped bathymetry for four Göteborg-region lakes:

• Härlanda Tjärn
• Stora Delsjön
• Rådasjön
• Kullsjön

Open the Map, turn on the Bathymetry layer, and you can inspect the contours before a session.

This is the practical side of the ecology work. Structure matters. Drop-offs, basins, shelves, saddles, shallow bays, and deep refuges all shape where fish can be comfortable and where they can feed. When the app can read the bottom and the conditions together, it gets closer to the way experienced anglers actually think.

Request a Lake

We are also opening the mapping queue.

If you fish a Swedish lake that is not yet mapped in Gilli, email us the lake name and we will build the bathymetry for you, usually within a week. Send the lake name, region, and a rough boundary if you have one to support@pelagiclabs.io.

Sweden is the focus first. If you fish elsewhere and want a lake mapped, write in anyway. We are tracking demand and using those requests to decide where the archive and mapping work goes next.

The Direction of Gilli

This is the direction Gilli is moving: fewer generic answers, more field intelligence.

Not every fish behaves the same way. Not every lake mixes the same way. Not every depth zone matters in every season. Not every good-looking day is actually good underwater.

Gilli 2.0.1 brings more of that reality into the app.

Update Gilli, open Lake Ecology or Sea Ecology on Pro, and look at your water again.