Coelacanth was a :

Options

A. Invertebrate
B. Fish
C. Amphibians
D. Reptile

Explanation

### Step-by-Step Solution:

1. **Understanding Coelacanth**: Coelacanth is a type of fish that was believed to have been extinct for millions of years until it was rediscovered in 1938 off the coast of South Africa.

2. **Classification of Coelacanth**: Coelacanth belongs to the class of fish. It is specifically categorized under the lobe-finned fish (Sarcopterygii), which is distinct from other fish classes.

3. **Characteristics of Coelacanth**: Coelacanths possess both fish-like and amphibian-like characteristics. They have a unique structure in their fins that resembles the limbs of amphibians, which is why they are sometimes considered a transitional form between fish and amphibians.

4. **Conclusion**: Despite having some amphibian-like features, Coelacanth is primarily classified as a fish due to its predominant characteristics, which align more closely with those of fish.

5. **Final Answer**: Coelacanth was a fish.