What kind of fish has a FCR 1.1 or less?

It's impossible to say what kind of fish has an FCR of 1.1 or less without more context.

Here's why:

* FCR (Feed Conversion Ratio) is a specific measure for a particular species under specific conditions. It's not a fixed value for any fish species.

* FCR is influenced by many factors:

* Fish species: Different fish species have different natural efficiencies in converting feed to body weight.

* Age and size of fish: Young, growing fish typically have better FCRs than older, larger fish.

* Feed quality and composition: High-quality, balanced feed will lead to better FCRs than poor-quality or inadequate feed.

* Water quality and temperature: Optimal conditions for the fish will lead to better FCRs.

* Stocking density and management practices: These factors can impact how efficiently fish convert feed.

To find a fish with an FCR of 1.1 or less, you need to provide more information:

* Species: What specific species are you interested in?

* Conditions: What are the specific rearing conditions (age, feed type, water quality, etc.)?

Once you have this information, you can:

* Consult scientific literature: Look for research papers or studies that have measured FCR for the specific species and conditions you're interested in.

* Contact experts: Aquaculture specialists or fish nutritionists can provide information on FCR values for specific species and conditions.

Remember that FCR is a dynamic value that changes depending on the specific context.