Tennøya

Site 12449 · Frøya municipality · Production area 6, Nordmøre og Sør-Trøndelag

Status unknown: not reported in week 39Operated by Mowi Seawater Norway AS · group Mowi

unknownAdult female lice per fishNo count in week 39. Latest: 0.45 in week 38, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 38 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

12Lice treatments in 2026Latest: Mechanical delousing, week 32, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Active disease casesPD, confirmed 20 Mar 2026Register since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

6Wellboat visits in 2026by 2 different vessels · latest 26 Feb 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported13,535 salmon, September 2019Since 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	0.36	0.5	Below the limit
2	0.12	0.5	Below the limit
3	0.03	0.5	Below the limit
4	0.08	0.5	Below the limit
5	0.10	0.5	Below the limit
6	0.12	0.5	Below the limit
7	0.22	0.5	Below the limit
8	0.25	0.5	Below the limit
9	0.27	0.5	Below the limit
10	0.16	0.5	Below the limit
11	0.18	0.5	Below the limit
12	0.35	0.5	Below the limit
13	0.34	0.5	Below the limit
14	0.34	0.5	Below the limit
15	0.33	0.5	Below the limit
16	0.13	0.2	Below the limit
17	0.04	0.2	Below the limit
18	0.11	0.2	Below the limit
19	0.17	0.2	Near the limit
20	0.10	0.2	Below the limit
21	0.11	0.2	Below the limit
22	0.16	0.5	Below the limit
23	0.14	0.5	Below the limit
24	0.12	0.5	Below the limit
25	0.20	0.5	Below the limit
26	0.02	0.5	Below the limit
27	0.03	0.5	Below the limit
28	0.06	0.5	Below the limit
29	0.08	0.5	Below the limit
30	0.10	0.5	Below the limit
31	0.13	0.5	Below the limit
32	0.10	0.5	Below the limit
33	0.03	0.5	Below the limit
34	0.13	0.5	Below the limit
35	0.10	0.5	Below the limit
36	0.32	0.5	Below the limit
37	0.41	0.5	Near the limit
38	0.45	0.5	Near the limit
39	unknown	0.5	Not reported

Earlier years

20254 of 36 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	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	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	0.01	0.5	Below the limit
26	0.06	0.5	Below the limit
27	0.02	0.5	Below the limit
28	0.02	0.5	Below the limit
29	0.12	0.5	Below the limit
30	0.07	0.5	Below the limit
31	0.04	0.5	Below the limit
32	0.04	0.5	Below the limit
33	0.46	0.5	Near the limit
34	0.15	0.5	Below the limit
35	0.03	0.5	Below the limit
36	0.29	0.5	Below the limit
37	0.06	0.5	Below the limit
38	0.21	0.5	Below the limit
39	0.44	0.5	Near the limit
40	0.83	0.5	Above the limit
41	1.14	0.5	Above the limit
42	1.16	0.5	Above the limit
43	0.48	0.5	Near the limit
44	0.27	0.5	Below the limit
45	0.22	0.5	Below the limit
46	0.11	0.5	Below the limit
47	0.20	0.5	Below the limit
48	0.14	0.5	Below the limit
49	0.40	0.5	Near the limit
50	0.45	0.5	Near the limit
51	0.52	0.5	Above the limit
52	0.46	0.5	Near the limit

20240 of 30 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	0.11	0.5	Below the limit
2	0.05	0.5	Below the limit
3	0.13	0.5	Below the limit
4	0.15	0.5	Below the limit
5	unknown	0.5	Reported without a count
6	0.07	0.5	Below the limit
7	0.11	0.5	Below the limit
8	0.16	0.5	Below the limit
9	0.09	0.5	Below the limit
10	0.31	0.5	Below the limit
11	0.24	0.5	Below the limit
12	0.16	0.5	Below the limit
13	0.23	0.5	Below the limit
14	0.17	0.5	Below the limit
15	0.11	0.5	Below the limit
16	0.15	0.2	Below the limit
17	0.12	0.2	Below the limit
18	0.06	0.2	Below the limit
19	0.01	0.2	Below the limit
20	0.04	0.2	Below the limit
21	0.06	0.2	Below the limit
22	0.16	0.5	Below the limit
23	0.14	0.5	Below the limit
24	0.02	0.5	Below the limit
25	0.02	0.5	Below the limit
26	0.42	0.5	Near the limit
27	0.22	0.5	Below the limit
28	0.32	0.5	Below the limit
29	0.30	0.5	Below the limit
30	0.40	0.5	Near the limit
31	0.44	0.5	Near the limit
32	unknown	0.5	Reported without a count
33	unknown	0.5	Reported without a count
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

20230 of 14 weeks with a count above the limit (data from week 40)

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, 2023
Week	Adult female lice per fish	Lice limit	Status
39	0.06	0.5	Below the limit
40	0.13	0.5	Below the limit
41	0.09	0.5	Below the limit
42	0.07	0.5	Below the limit
43	0.04	0.5	Below the limit
44	0.11	0.5	Below the limit
45	0.12	0.5	Below the limit
46	0.23	0.5	Below the limit
47	0.17	0.5	Below the limit
48	0.22	0.5	Below the limit
49	0.19	0.5	Below the limit
50	0.12	0.5	Below the limit
51	0.07	0.5	Below the limit
52	0.22	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 32, 2026
Mechanical delousing3 pens
Week 26, 2026
Mechanical delousingWhole site
Week 24, 2026
Mechanical delousingWhole site
Week 20, 2026
Mechanical delousing3 pens

Show all 40

Week 19, 2026
Mechanical delousing2 pens
Week 16, 2026
Mechanical delousing7 pens
Week 15, 2026
Mechanical delousing2 pens
Week 10, 2026
Mechanical delousing4 pens
Week 9, 2026
Mechanical delousing, Thermal delousing5 pens
Week 3, 2026
Thermal delousing2 pens
Week 2, 2026
Thermal delousing7 pens
Week 52, 2025
Mechanical delousing4 pens
Week 51, 2025
Mechanical delousing3 pens
Week 50, 2025
Mechanical delousing6 pens
Week 49, 2025
Mechanical delousing3 pens
Week 46, 2025
Thermal delousing6 pens
Week 45, 2025
Thermal delousing3 pens
Week 44, 2025
Thermal delousing1 pen
Week 43, 2025
Thermal delousing7 pens
Week 42, 2025
Thermal delousing1 pen
Week 38, 2025
Thermal delousing4 pens
Week 34, 2025
Thermal delousingWhole site
Week 33, 2025
Mechanical delousing1 pen
Week 32, 2025
Mechanical delousing1 pen
Week 29, 2025
Medicinal feed, Freshwater treatment6 pens · Emamectin benzoat
Week 28, 2025
Medicinal feed, Freshwater treatment4 pens · Emamectin benzoat
Week 27, 2025
Medicinal feed3 pens · Emamectin benzoat
Week 28, 2024
Mechanical delousing1 pen
Week 27, 2024
Mechanical delousing5 pens
Week 24, 2024
Mechanical delousingWhole site
Week 22, 2024
Mechanical delousing3 pens
Week 18, 2024
Mechanical delousing4 pens
Week 2, 2024
Mechanical delousing3 pens
Week 1, 2024
Mechanical delousing1 pen
Week 51, 2023
Mechanical delousing2 pens
Week 49, 2023
Mechanical delousing4 pens
Week 48, 2023
Mechanical delousing2 pens
Week 47, 2023
Mechanical delousing2 pens
Week 46, 2023
Mechanical delousing3 pens
Week 39, 2023
Mechanical delousing3 pens

Disease

Norwegian Food Safety Authority

20 Mar 2026
Pancreas disease (PD): confirmedStatus: active · Subtype SAV2 · started 23 Feb 2026 · Norwegian Food Safety Authority
14 Dec 2024
Infectious salmon anaemia (ISA): closedstarted 12 Jul 2024 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

16 Sep 2019
13,535 salmon escapedCause: Mulig notbunn var i kontakt med bunnring ved sterk strøm · recaptured 1 · Directorate of Fisheries

Wellboat visits

6 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
26 Feb 2026	Freyja	Hendneset	29 h 3 min
25 Feb 2026	Freyja	Hendneset	9 h 36 min
13 Jan 2026	Froy Saga	Lamøya	19 h 33 min
11 Jan 2026	Froy Saga	Lamøya	11 h 7 min
08 Jan 2026	Froy Saga	Lamøya	37 h 31 min
07 Jan 2026	Froy Saga	Lamøya	9 h 47 min
12 Nov 2025	Froy Saga	Heggvika	7 h 18 min
10 Nov 2025	Froy Saga	Heggvika	22 h 24 min
27 Oct 2025	Froy Saga	Mannbruholmen	6 h 7 min
26 Oct 2025	Froy Saga	Mannbruholmen	21 h 18 min
25 Oct 2025	Freyja	Havsundet	23 h 18 min
24 Oct 2025	Freyja	Havsundet	3 h 35 min

Show 37 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
23 Oct 2025	Freyja	Havsundet	7 h 3 min
22 Oct 2025	Freyja	Havsundet	19 h 6 min
21 Oct 2025	Freyja	Havsundet	1 h 26 min
21 Oct 2025	Freyja	Havsundet	3 h 12 min
20 Oct 2025	Freyja	Havsundet	21 h 12 min
18 Sep 2025	Froy Jarl	Munkskjæra	17 h 10 min
17 Sep 2025	Froy Jarl	Munkskjæra	3 h 37 min
05 Sep 2025	Froy Jarl	Heggvika	8 h 28 min
04 Sep 2025	Froy Jarl	Heggvika	19 h 36 min
25 Aug 2025	Froy Saga	Kveitskjeret	7 h 4 min
24 Aug 2025	Froy Saga	Kveitskjeret	9 h 35 min
24 Aug 2025	Froy Saga	Kveitskjeret	2 h 35 min
23 Aug 2025	Froy Saga	Kveitskjeret	18 h 58 min
22 Aug 2025	Froy Saga	Kveitskjeret	8 h 4 min
21 Aug 2025	Froy Saga	Kveitskjeret	12 h 7 min
20 Aug 2025	Froy Saga	Kveitskjeret	17 h 47 min
19 Aug 2025	Froy Saga	Kveitskjeret	11 h 6 min
19 Aug 2025	Froy Saga	Kveitskjeret	4 h 11 min
12 Aug 2025	Froy Saga	Heggvika	4 h 49 min
11 Aug 2025	Froy Saga	Heggvika	4 h 35 min
09 Aug 2025	Froy Saga	Heggvika	9 h 58 min
15 Jul 2025	Freyja	Kveitskjeret	8 h 33 min
14 Jul 2025	Freyja	Kveitskjeret	8 h 6 min
13 Jul 2025	Freyja	Kveitskjeret	5 h 24 min
12 Jul 2025	Freyja	Kveitskjeret	11 h 36 min
05 Jul 2025	Froy Saga	Heggvika	6 h 54 min
04 Jul 2025	Froy Saga	Heggvika	3 h 1 min
04 Jul 2025	Froy Saga	Heggvika	4 h 6 min
27 Apr 2025	Ronja Evolution	Mannbruholmen	1 h 22 min
25 Apr 2025	Ronja Evolution	Mannbruholmen	1 h 23 min
24 Apr 2025	Ronja Evolution	Mannbruholmen	1 h 30 min
23 Apr 2025	Ronja Evolution	Mannbruholmen	2 h 56 min
26 Feb 2024	Froy Jarl	no other farm	2 h 9 min
15 Jan 2024	Freyja	Grøttingsøy	11 h 1 min
10 Jan 2024	Freyja	Grøttingsøy	23 h 54 min
08 Jan 2024	Freyja	Grøttingsøy	33 h 55 min
07 Jan 2024	Freyja	Grøttingsøy	20 h 6 min

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

Licences

Site MAB: 6,240 tonnes

Licence	Type	Capacity	Holder
ST F 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,313 t	Mowi Seawater Norway AS
ST F 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0012	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0015	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0021	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS
ST F 0024	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Mowi Seawater Norway AS

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