Oceanodromous fishes migrate from

Options

A. Fresh to fresh water
B. Fresh to marine water
C. Marine to fresh water
D. Marine to marine water

Answer

**Step-by-Step Solution:**

1. **Understand the Term "Oceanodromous Fishes":**
Oceanodromous fishes are species that migrate within marine environments. Their migration does not involve freshwater; instead, it occurs entirely in marine waters.

2. **Identify the Purpose of Migration:**
These fishes migrate primarily for breeding, mating, or laying eggs. This behavior is crucial for the continuation of their species.

3. **Analyze the Options Given:**
- **Option A:** Fresh to freshwater - This describes potamodromous migration, not oceanodromous.
- **Option B:** Fresh to marine water - This describes catadromous migration, not oceanodromous.
- **Option C:** Marine to freshwater - This describes anadromous migration, not oceanodromous.
- **Option D:** Marine to marine water - This is the correct definition of oceanodromous migration.

4. **Conclude the Correct Answer:**
Based on the definitions and explanations, the correct answer to the question "Oceanodromous fishes migrate from" is **marine to marine water**.

**Final Answer:**
Oceanodromous fishes migrate from marine to marine water.

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