| HOOKWORM | Intestinal parasite that often migrates to the gut from the foot |
| METALLIC | Setter receiving great kick in the guts -- from copper? (8) |
| COLDFEET | Loss of guts from fish biting large parts of line (4,4) |
| SORROW | Misery guts from Kosovo with royal rank (6) |
| STEELHEAD | Silvery North Pacific variety of the rainbow trout that migrates to the sea before returning to fresh water to spawn (9) |
| SWALLOW | Hirundine that migrates to the UK to breed (7) |
| SMOLT | Young salmon after the parr stage, when it turns silvery and migrates to the sea for the first time (5) |
| FIELDFARE | Large thrush that migrates to the UK for winter |
| SALMON | Fish usually born in fresh water but which migrates to the sea, served in dishes such as blini, ceviche, gravlax, quiche, sushi, sashimi and teriyaki (6) |
| VAGUS | The body's "wandering nerve", aptly named for its extensive meandering course traveling from the medulla oblongata of the brain to the gut (5) |
| HARRIER | Mediumsized long-winged bird of prey that migrates to Africa to spend the winter (8,7) |
| MONTAGUS | Mediumsized long-winged bird of prey that migrates to Africa to spend the winter (8,7) |
| EEL | Sinuous fish that migrates to Sargasso Sea to spawn (3) |
| SMOLTS | Young river salmon ready to migrate to the sea (6) |
| WHEATEAR | Songbird that migrates to sub-Saharan Africa |
| FLEA | Dog parasite that anagrams to something that falls from a tree |
| ARCHITECT | Wren perhaps could migrate to the Arctic (9) |
| NEWHEBRIDES | See when bird migrates to Vanuatu (3,8) |
| HALIBUT | Fish whose left eye migrates to its right side as it ages (!?) |
| DERMATOLOGIST | Skin scientist migrates to old environs (13) |
