diff --git a/modules/nf-core/anarcii/main.nf b/modules/nf-core/anarcii/main.nf
index 966a5142958d..afca576c33a7 100644
--- a/modules/nf-core/anarcii/main.nf
+++ b/modules/nf-core/anarcii/main.nf
@@ -3,12 +3,13 @@ process ANARCII {
     label 'process_single'
 
     conda "${moduleDir}/environment.yml"
-    container "${workflow.containerEngine in ['singularity', 'apptainer']
+    container "${workflow.containerEngine in ['singularity', 'apptainer'] && !task.ext.singularity_pull_docker_container
         ? 'https://community-cr-prod.seqera.io/docker/registry/v2/blobs/sha256/c5/c56cb3320588978063f0893876f4f2b6f088dadc75628f60a746ee54e72350a6/data'
         : 'community.wave.seqera.io/library/python_pip_anarcii:4e5c3ffabd22d3fc'}"
 
     input:
     tuple val(meta), path(fasta)
+    val seq_type
 
     output:
     tuple val(meta), path("*.csv"), emit: anarcii
@@ -22,6 +23,7 @@ process ANARCII {
     def prefix = task.ext.prefix ?: "${meta.id}"
     """
     anarcii \\
+        -t ${seq_type} \\
         ${args}\\
         -o ${prefix}.csv \\
         ${fasta}
diff --git a/modules/nf-core/anarcii/meta.yml b/modules/nf-core/anarcii/meta.yml
index 0c0bd345f5ce..c0c44d51e911 100644
--- a/modules/nf-core/anarcii/meta.yml
+++ b/modules/nf-core/anarcii/meta.yml
@@ -27,6 +27,11 @@ input:
         pattern: "*.fasta"
         ontologies:
           - edam: http://edamontology.org/format_1929
+  - seq_type:
+      type: string
+      description: |
+        Receptor type to number, passed to ANARCII's `-t` flag. Selects the model used for alignment.
+      pattern: "antibody|tcr|vnar|vhh|shark|unknown"
 output:
   anarcii:
     - - meta:
diff --git a/modules/nf-core/anarcii/tests/main.nf.test b/modules/nf-core/anarcii/tests/main.nf.test
index 15ee9c4237ce..b7f4210056a6 100644
--- a/modules/nf-core/anarcii/tests/main.nf.test
+++ b/modules/nf-core/anarcii/tests/main.nf.test
@@ -18,6 +18,7 @@ nextflow_process {
                     [ id:'test' ],
                     file(params.modules_testdata_base_path + 'genomics/homo_sapiens/anarcii/anarcii_vdjdb.fasta', checkIfExists: true),
                 ]
+                input[1] = 'tcr'
                 """
             }
         }
@@ -30,6 +31,17 @@ nextflow_process {
             assert "Score" in anarciiResults.columnNames
             assert "Query start" in anarciiResults.columnNames
             assert "Query end" in anarciiResults.columnNames
+            // A mismatched seq_type leaves sequences unnumbered as chain "F" instead of failing
+            assert anarciiResults.columns["Chain"].every { it in ["A", "B"] }
+            // Score drifts with thread count, so the file md5 is not portable across machines
+            assert snapshot(
+                anarciiResults.columnNames.sort(),
+                anarciiResults.columns["Name"],
+                anarciiResults.columns["Chain"],
+                anarciiResults.columns["Query start"],
+                anarciiResults.columns["Query end"],
+                process.out.versions_anarcii
+            ).match()
         }
     }
 
@@ -44,6 +56,7 @@ nextflow_process {
                     [ id:'test' ],
                     file(params.modules_testdata_base_path + 'genomics/homo_sapiens/anarcii/anarcii_vdjdb.fasta', checkIfExists: true),
                 ]
+                input[1] = 'tcr'
                 """
             }
         }
diff --git a/modules/nf-core/anarcii/tests/main.nf.test.snap b/modules/nf-core/anarcii/tests/main.nf.test.snap
index 7c6d258b896a..1e69ba6b1934 100644
--- a/modules/nf-core/anarcii/tests/main.nf.test.snap
+++ b/modules/nf-core/anarcii/tests/main.nf.test.snap
@@ -1,4 +1,207 @@
 {
+    "human - fasta": {
+        "content": [
+            [
+                "1",
+                "10",
+                "100",
+                "101",
+                "102",
+                "103",
+                "104",
+                "105",
+                "106",
+                "107",
+                "108",
+                "109",
+                "11",
+                "110",
+                "111",
+                "111A",
+                "111B",
+                "112",
+                "112A",
+                "112B",
+                "113",
+                "114",
+                "115",
+                "116",
+                "117",
+                "118",
+                "119",
+                "12",
+                "120",
+                "121",
+                "122",
+                "123",
+                "124",
+                "125",
+                "126",
+                "127",
+                "128",
+                "13",
+                "14",
+                "15",
+                "16",
+                "17",
+                "18",
+                "19",
+                "2",
+                "20",
+                "21",
+                "22",
+                "23",
+                "24",
+                "25",
+                "26",
+                "27",
+                "28",
+                "29",
+                "3",
+                "30",
+                "31",
+                "32",
+                "33",
+                "34",
+                "35",
+                "36",
+                "37",
+                "38",
+                "39",
+                "4",
+                "40",
+                "41",
+                "42",
+                "43",
+                "44",
+                "45",
+                "46",
+                "47",
+                "48",
+                "49",
+                "5",
+                "50",
+                "51",
+                "52",
+                "53",
+                "54",
+                "55",
+                "56",
+                "57",
+                "58",
+                "59",
+                "6",
+                "60",
+                "61",
+                "62",
+                "63",
+                "64",
+                "65",
+                "66",
+                "67",
+                "68",
+                "69",
+                "7",
+                "70",
+                "71",
+                "72",
+                "73",
+                "74",
+                "75",
+                "76",
+                "77",
+                "78",
+                "79",
+                "8",
+                "80",
+                "81",
+                "82",
+                "83",
+                "84",
+                "85",
+                "86",
+                "87",
+                "88",
+                "89",
+                "9",
+                "90",
+                "91",
+                "92",
+                "93",
+                "94",
+                "95",
+                "96",
+                "97",
+                "98",
+                "99",
+                "Chain",
+                "Name",
+                "Query end",
+                "Query start",
+                "Score"
+            ],
+            [
+                "298|TRA",
+                "298|TRB",
+                "299|TRA",
+                "299|TRB",
+                "300|TRA",
+                "300|TRB",
+                "301|TRA",
+                "301|TRB",
+                "302|TRA",
+                "302|TRB"
+            ],
+            [
+                "A",
+                "B",
+                "A",
+                "B",
+                "A",
+                "B",
+                "A",
+                "B",
+                "A",
+                "B"
+            ],
+            [
+                20,
+                19,
+                19,
+                19,
+                20,
+                19,
+                18,
+                19,
+                18,
+                19
+            ],
+            [
+                133,
+                133,
+                132,
+                131,
+                135,
+                137,
+                130,
+                130,
+                130,
+                133
+            ],
+            [
+                [
+                    "ANARCII",
+                    "anarcii",
+                    "2.0.5"
+                ]
+            ]
+        ],
+        "timestamp": "2026-08-26T11:14:14.316916324",
+        "meta": {
+            "nf-test": "0.9.5",
+            "nextflow": "25.10.4"
+        }
+    },
     "human - fasta - stub": {
         "content": [
             {