Generally, the bigger these three segments are, the stronger the krill is.
Furthermore, krill have two pairs of antennae and complex compound eyes, and these compound eyes are black.
It also has around 6-8 pairs of legs on its thorax and 5 swimming legs called swimmerets on its abdomen.
On the other hand, shrimp comes in two segments.
These two segments are called the cephalothorax and abdomen.
Unlike krill, shrimp comes with a long abdomen.
Moreover, some species of these animals have a tail fan (double tails like fish).
Like a krill, a shrimp also has two pairs of antennae, compound eyes, and five pairs of accessory jaws.
In the krill vs shrimp comparison, the latter five comes with five pairs of legs.
The five legs are used for walking and the other 5 are considered swimming legs.
When comparing krill vs shrimp color, the former are transparent in most cases. Some come in red and pink pigment spots in their outer shell.
On the other hand, shrimp are bright and colorful.
They can also come in red, pink, and light brown.
Mantis shrimp, another species of this animal, comes in blue, green, and yellow.
Take note that the color of shrimp can vary depending on age and season.
According to a study published in the Journal of Northwest Atlantic and Fishery Science, the color of shrimps also depends on gender.
The female ones are reported to be brighter.
4) Species and lifespan
In terms of krill vs shrimp species, the former comes with 85 species while the latter comes with 1,900 species.
Shrimp can also lay a million eggs in just one season.
In terms of their lifespan, krill have a longer lifespan, around ten years. Meanwhile, shrimp has a lifespan of two years.
Krill vs Shrimp Lifestyle
The lifestyle of these two animals differs as well. In this section, we will discuss the habitat and diet of krill and shrimp.
These animals, krill, live in salt water only.
Some reports say that the krill live in very cold water as well. Generally, they can be found in the Southern ocean.
On the other hand, shrimp lives in saltwater and freshwater. However, this depends on shrimp species. Take note that oil spills and pollution affect their habitat.
2) Ice algae
Shrimp and krill eat algae. Algae is rich in proteins that these animals can use as an energy source.
But, if we will be comparing these two, both of them do not only eat algae but also get their diet from different sources.
Generally, krill eat single-celled plants.
These single-celled plants are called phytoplankton. On the other hand, shrimp eat small fish, plankton, and aquatic plants.
Indeed, shrimp and krill are essential not just in the marine food cycle but in the human food cycle as well.
Although these animals are usually considered prey, they come with many differences.
These differences are in terms of size, morphology, body color, species, lifespan, habitat, and diet.
Still, there are some similarities between these two.
Some of these similarities are they both consume algae and they both contain tail fans.
In terms of wellness, krills are used to make supplements while the other ones are used for cooking and flavoring.
Frequently Asked Questions (FAQs)
Do shrimp snack on krills?
Even though these two are prey, although not haunted, shrimp also take krills as part of their diet. However, this depends on the shrimp species and where they live. According to some reports, it is hard for these animals to swim. Thus, when animals try to eat them, they cannot move properly.
Why are krills not considered shrimp?
Krills are tiny shrimp-like shellfish. However, even though they resemble shrimp, they contain 3 segments while the other is only made of two. Additionally, these two belong to different orders. Krill belongs to the order of Euphausiacea while the other belongs to the order of Natantia.
Why do krills eat phytoplankton?
Krills eat phytoplankton because these plants contain chlorophyll that helps them thrive. Aside from these animals, phytoplankton is also eaten by fish, small sharks, corals, and whales.
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