Head to head
Sand Lance vs Capelin
A sand lance and a capelin both live and die mostly unnoticed by people, yet both carry an outsized share of responsibility for keeping much larger North Atlantic and Arctic predators fed.
| Sand Lance | Capelin | |
|---|---|---|
| Genus | Ammodytes | Mallotus |
| Signature behaviour | Burrows into sand | Mass beach-spawning ("capelin rolling") |
| Diet | Filter feeder, small plankton | Filter feeder, small plankton |
| Habitat | Sandy coastal seafloor | Open cold ocean water |
| Lifespan | Relatively short | Relatively short |
| Key predators fed | Seabirds, fish, seals, whales | Cod, seabirds, seals, whales |
| Population sensitivity | Water temperature, sand quality | Water temperature |
| Conservation status | Least Concern | Least Concern |
Sand Lance vs Capelin: common questions
Why are sand lance and capelin both considered so ecologically important?
Both species serve as central forage fish linking plankton at the base of the food web to a wide range of much larger predators, including seabirds, larger fish, seals, and whales, meaning fluctuations in either species' abundance can ripple outward to affect the breeding success and food availability of numerous other animals throughout the North Atlantic and Arctic.
What is the main behavioural difference between sand lance and capelin?
A sand lance spends much of its life buried in clean sandy seafloor, only emerging to school and feed, while capelin remain in open water for most of the year before undertaking a dramatic mass beach-spawning event known as capelin rolling, a striking behavioural contrast between a burrowing species and one that briefly floods onto shore in enormous numbers.
Do sand lance and capelin feed the same predators?
Yes, both species are relied upon by a broadly overlapping set of predators, including various seabirds, larger fish such as cod, seals, and whales, meaning the two forage fish effectively serve a similar ecological role within slightly different habitats and behavioural niches across the North Atlantic and Arctic.