Midtflua

Site 13541 · Tysnes municipality · Production area 3, Karmøy til Sotra

Below the lice limit, week 39Operated by Lerøy Vest Sjø AS · group Lerøy Seafood Group

0.10Adult female lice per fishLimit 0.50 · below the limitWeek 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 25 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

0Lice treatments in 2026None recorded2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone active · 1 earlierRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

11Wellboat visits in 2026by 1 vessel · latest 16 May 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported27 rainbow trout, November 2018Since 2006 · Directorate of Fisheries · updated 01 Oct 2026

Sea lice against the limit

Weekly average of adult female lice per fish, as reported by the company. For this site the limit is 0.2 in weeks 16–21 and 0.5 for the rest of the year. Hatched weeks have no count and count neither as above nor below.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	unknown	0.5	Not reported
12	unknown	0.5	Not reported
13	unknown	0.5	Not reported
14	unknown	0.5	Not reported
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.00	0.2	Below the limit
21	0.00	0.2	Below the limit
22	0.00	0.5	Below the limit
23	0.00	0.5	Below the limit
24	0.00	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.01	0.5	Below the limit
27	0.01	0.5	Below the limit
28	0.01	0.5	Below the limit
29	0.01	0.5	Below the limit
30	0.00	0.5	Below the limit
31	0.01	0.5	Below the limit
32	0.01	0.5	Below the limit
33	0.01	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.03	0.5	Below the limit
36	0.04	0.5	Below the limit
37	0.07	0.5	Below the limit
38	0.08	0.5	Below the limit
39	0.10	0.5	Below the limit

Earlier years

20250 of 24 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.16	0.5	Below the limit
2	0.08	0.5	Below the limit
3	0.17	0.5	Below the limit
4	0.29	0.5	Below the limit
5	0.36	0.5	Below the limit
6	0.40	0.5	Near the limit
7	0.49	0.5	Near the limit
8	0.46	0.5	Near the limit
9	0.25	0.5	Below the limit
10	0.19	0.5	Below the limit
11	0.03	0.5	Below the limit
12	0.05	0.5	Below the limit
13	0.05	0.5	Below the limit
14	0.05	0.5	Below the limit
15	0.07	0.5	Below the limit
16	unknown	0.2	Reported without a count
17	0.11	0.2	Below the limit
18	0.10	0.2	Below the limit
19	0.11	0.2	Below the limit
20	0.14	0.2	Below the limit
21	0.14	0.2	Below the limit
22	0.15	0.5	Below the limit
23	0.18	0.5	Below the limit
24	0.11	0.5	Below the limit
25	0.13	0.5	Below the limit
26	unknown	0.5	Reported without a count
27	unknown	0.5	Not reported
28	unknown	0.5	Reported without a count
29	unknown	0.5	Not reported
30	unknown	0.5	Not reported
31	unknown	0.5	Not reported
32	unknown	0.5	Not reported
33	unknown	0.5	Not reported
34	unknown	0.5	Not reported
35	unknown	0.5	Not reported
36	unknown	0.5	Not reported
37	unknown	0.5	Not reported
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported
40	unknown	0.5	Not reported
41	unknown	0.5	Not reported
42	unknown	0.5	Not reported
43	unknown	0.5	Not reported
44	unknown	0.5	Not reported
45	unknown	0.5	Not reported
46	unknown	0.5	Not reported
47	unknown	0.5	Not reported
48	unknown	0.5	Not reported
49	unknown	0.5	Not reported
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20240 of 31 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2024
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	unknown	0.5	Not reported
12	unknown	0.5	Not reported
13	unknown	0.5	Not reported
14	unknown	0.5	Not reported
15	unknown	0.5	Not reported
16	unknown	0.2	Not reported
17	unknown	0.2	Not reported
18	unknown	0.2	Not reported
19	unknown	0.2	Not reported
20	unknown	0.2	Reported without a count
21	0.01	0.2	Below the limit
22	0.00	0.5	Below the limit
23	0.00	0.5	Below the limit
24	0.01	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.00	0.5	Below the limit
27	0.01	0.5	Below the limit
28	0.04	0.5	Below the limit
29	0.06	0.5	Below the limit
30	0.09	0.5	Below the limit
31	unknown	0.5	Reported without a count
32	0.16	0.5	Below the limit
33	0.17	0.5	Below the limit
34	0.17	0.5	Below the limit
35	0.13	0.5	Below the limit
36	0.14	0.5	Below the limit
37	0.14	0.5	Below the limit
38	0.25	0.5	Below the limit
39	0.14	0.5	Below the limit
40	0.33	0.5	Below the limit
41	0.37	0.5	Below the limit
42	0.02	0.5	Below the limit
43	0.02	0.5	Below the limit
44	0.03	0.5	Below the limit
45	0.08	0.5	Below the limit
46	0.28	0.5	Below the limit
47	0.45	0.5	Near the limit
48	0.48	0.5	Near the limit
49	0.46	0.5	Near the limit
50	0.13	0.5	Below the limit
51	0.10	0.5	Below the limit
52	0.12	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 22, 2025
Thermal delousing, Freshwater treatment2 pens
Week 18, 2025
Freshwater treatment, Thermal delousing4 pens
Week 11, 2025
Freshwater treatment, Thermal delousing2 pens
Week 9, 2025
Thermal delousing, Freshwater treatment6 pens

Show all 10

Week 8, 2025
Thermal delousing, Freshwater treatment2 pens
Week 2, 2025
Freshwater treatment, Thermal delousing2 pens
Week 50, 2024
Thermal delousing, Freshwater treatment8 pens
Week 49, 2024
Thermal delousing, Freshwater treatment2 pens
Week 42, 2024
Freshwater treatment, Thermal delousing4 pens
Week 41, 2024
Freshwater treatment, Thermal delousing6 pens

Disease

Norwegian Food Safety Authority

01 Feb 2026
Pancreas disease (PD): closedSubtype SAV3 · started 08 May 2025 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

19 Nov 2018
27 rainbow trout escapedCause: Annet · recaptured 1 · Directorate of Fisheries

Wellboat visits

11 visits in 2026

Visits are derived by us from the Coastal Administration's AIS positions: a fish carrier stationary within 500 metres of the farm for at least 30 minutes. The AIS archive lags about 17 days. A visit is not proof of infection.

Arrival	Vessel	Previous farm (14 days)	Duration
16 May 2026	Seifjell	Haugsnesvåg	1 h 17 min
16 May 2026	Seifjell	Haugsnesvåg	3 h 52 min
15 May 2026	Seifjell	Haugsnesvåg	1 h 19 min
14 May 2026	Seifjell	Haugsnesvåg	1 h 19 min
14 May 2026	Seifjell	Haugsnesvåg	2 h 50 min
13 May 2026	Seifjell	Haugsnesvåg	49 min
13 May 2026	Seifjell	Haugsnesvåg	5 h 47 min
12 May 2026	Seifjell	Haugsnesvåg	1 h 54 min
12 May 2026	Seifjell	Haugsnesvåg	1 h 44 min
20 Apr 2026	Seifjell	Skorpo NV	1 h 31 min
10 Apr 2026	Seifjell	Sagen 2	4 h 29 min
30 May 2025	Seigrunn	Sagen 2	6 h 6 min

Show 26 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
29 May 2025	Seigrunn	Sagen 2	7 h 47 min
01 May 2025	Seigrunn	Sagen 2	23 h 11 min
15 Mar 2025	Seigrunn	Haugsnesvåg	5 h 37 min
15 Mar 2025	Seigrunn	Haugsnesvåg	3 h 16 min
15 Mar 2025	Seigrunn	Haugsnesvåg	4 h 16 min
27 Feb 2025	Seigrunn	Sagen 2	3 h 31 min
26 Feb 2025	Seigrunn	Sagen 2	15 h 27 min
26 Feb 2025	Seigrunn	Sagen 2	6 h 0 min
25 Feb 2025	Seigrunn	Sagen 2	5 h 10 min
25 Feb 2025	Seigrunn	Sagen 2	6 h 0 min
24 Feb 2025	Seigrunn	Sagen 2	2 h 45 min
22 Feb 2025	Seigrunn	Haugsnesvåg	16 h 17 min
10 Dec 2024	Seihav	Tepstad	8 h 38 min
09 Dec 2024	Seihav	Tepstad	19 h 22 min
03 Dec 2024	Seihav	Hestabyneset	12 h 3 min
15 Oct 2024	Seihav	Sagen 2	10 h 19 min
14 Oct 2024	Seihav	Sagen 2	11 h 23 min
13 Oct 2024	Seihav	Sagen 2	2 h 9 min
13 Oct 2024	Seihav	Sagen 2	18 h 23 min
12 Oct 2024	Seihav	Sagen 2	9 h 20 min
21 May 2024	Seifjell	Skorpo NV	1 h 6 min
20 May 2024	Seifjell	Skorpo NV	2 h 24 min
19 May 2024	Seifjell	Skorpo NV	2 h 29 min
18 May 2024	Seifjell	Skorpo NV	2 h 26 min
17 May 2024	Seifjell	Skorpo NV	2 h 5 min
16 May 2024	Seifjell	Skorpo NV	2 h 35 min

Source: Norwegian Coastal Administration (AIS) · calculated by the Salmon Ledger · updated 01 Oct 2026

Licences

Site MAB: 3,120 tonnes

Licence	Type	Capacity	Holder
H T 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Lerøy Vest Sjø AS
H T 0015	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Lerøy Vest Sjø AS
H T 0018	Kommersiell / matfiskSalmon, Rainbow trout, Trout	345 t	Lerøy Vest Sjø AS

Source: Directorate of Fisheries, aquaculture register · updated 01 Oct 2026