Cleaner Shrimp Evolution

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The Convergent Evolution of Feeder Fish and Shrimp
Introduction
Cleaner fish and cleaner shrimp fill the same ecological niche. Cleaner fish and cleaner shrimp fill the same ecological niche. Cleaner fish and cleaner shrimp fill the same ecological niche (OpenStax College, 2013).

Discussion
Cleaner fish and cleaner shrimp fill the same ecological niche. Cleaner fish and cleaner shrimp fill the same ecological niche. Cleaner fish and cleaner shrimp fill the same ecological niche (OpenStax College, 2013).

1. Describe what makes this trait an adaptation.
A trait is simply a physiological or behavioral feature, whereas a trait / adaptation is one that is inheritable, serves a functional purpose, and increases the fitness of the organism (Understanding Evolution, n.d.). In the case of both …show more content…

Briefly describe how the traits evolved; e.g., mutation, genetic drift, migration and/or natural selection. Be sure to support your answer with evidence
In the cleaner fish it is believed that the signal coloration trait evolved from existing lateral coloration lines present in many schooling fish. Over time natural selection selected out the color trait which best triggered an existing cleaner / host response (Arnal et al, 2006). For Lysmata amboinensis a red / orange color mutation was introduced into the Lysmata genus with those inheriting both high contrasting coloration and long white antenna (via natural selection) becoming cleaners.
3. What is the difference between homologous and analogous trait? How does your trait of choice fit either of these descriptions?
If multiple species inherit the same trait from a common ancestor, it is a homologous trait, whereas traits emerging independently are analogous traits (Whitson, n.d.). No common ancestor between the two chosen cleaner species shares this trait, therefore it is an analogous trait.

4. What is convergent and divergent evolution? Describe whether the trait is a result of convergent or divergent

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