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Articles » Fish Guides » Saltwater Fish » Blue Perch Fishing Tips: How to Catch Halfmoon Fish (Medialuna californiensis)

Blue Perch Fishing Tips: How to Catch Halfmoon Fish (Medialuna californiensis)

Do you like perch fishing?

If you said yes, you need to catch the blue perch (halfmoon fish).

how to catch blue perch halfmoon fish
Spline9 with the big Catalina halfmoon. Source

The fish can be found in waters that spread across the Gulf of California to Vancouver Island in British Columbia but they can also be found around the Channel Islands in Southern California. This perch species is also known by other names such as island mackerel, blue wizard, blue perch, blue bass, etc.

Overview

This black perch is a type of surf perch. The body of the half moon is compressed and oval in shape while the head is blunt and the mouth is quite small. The top of the body is dark blue in color which shades to a blue-gray color to the sides and it has a white underbelly. The reason why this California perch species is called half-moon is because of the unique shape of its tail which looks like a half moon.

This fish eats kelps which is why it can be found in abundance near or around kelp beds. However, you can also spot half moons in shallow water and rocky areas. This fish is not in danger of being overfished.

Halfmoon Perch Facts

Scientific Name Medialuna californiensis
Common Name(s) Blue perch, halfmoons, half moon fish, Catalina blue perch, blue bass, black perch
Family Kyphosidae
Characteristics Compressed and oval body with a blunt head and small mouth. The top of the body is dark blue in color which shades to a blue-gray color to the sides and it has a white underbelly
Depth Range 8 to 65 feet deep
Natural History Spread across the Gulf of California to Vancouver Island in British Columbia but can also be found around the Channel Islands in Southern California.
Limits Check your local regulations
Largest Recorded 19 inches and 4.75 pounds
Status Least concerned

Half moon perch typically inhabit shallow rocky areas, floating kelp paddies as well as kelp beds. Plus, this fish is also susceptible to disturbances that can compromise its survival such as pollution and habitat degradation.

In other words, if you are going half-moon bay pier fishing, make sure that the water does not have pollutants floating on top. Some of the best piers you should go to include the Hermosa Beach Pier, Redondo Harbor Sportfishing Pier, Gaviota Pier, and Paradise Cove Pier.

Half Moon Perch Habitat

If you prefer to fish for this Catalina blue perch by boat, you will need to go out in deep water. Half moon perch can also be found in loose schools of fish in mid-water as well as mixed together with schools of pile perch.

How to Catch Blue Perch

When it comes to catching this surf perch, rod and reel setups can fall into two categories. For surf fishing from shore, you can either use a typical surf casting setup using a long and surf rod complete with heavy weights and surf fishing reel to help you reach a far distance. These can give you a large casting range but they can be quite difficult to handle and are not as sensitive as you may need them to be.

However, if you’re on a boat you can use a fast action, short to mid-length rod made of graphite which is lighter and has a conventional or spinning reel. These blue perch will tend to be close to your boat or structure so you won’t need anything special to catch them.

Use size 2 or 4 bait hooks and particularly baitholder or circle varieties. These do a great job in keeping the bait on the hook. Plus, use live bait such as marine worms, crabs, sand shrimp, and mussels to attract the fish.

Blue Perch Fishing Tactics

  1. Look for areas in the water that have deep depressions that could hold this fish. These include areas near rocky jetties, rocky areas in the sand.
  2. The best time to fish for this kelp perch is when the tide is coming in. Make sure to scout out possible spots when the tide is low beforehand.

Halfmoon Fishing Tips

  • Plastic baits such as Berkley Gulp sand worms stay on the hook longer than live bait.
  • Round haul nets can help you catch this aggressive fish without hurting yourself.

Spearfishing Halfmoons

spearfishing halfmoons
Here Sean got close to a Catalina halfmoon swimming with calico bass. Source

If you’re looking for a fun perch to bring home for the dinner plate than try spearfishing for the Catalina halfmoon. They are relatively easy fish to shoot since they aren’t super skittish which allows you to get close before pulling the trigger.

A large speargun might be overkill, so try using a pole spear if you want to make this fish more challenging to catch.

Blue Perch Seasons

The half moon perch is available all season long which means you can find it in abundance all year but they are more abundant from August to April. It is an aggressive fighter and an excellent table fish. The blue perch fish spawns during the summer and one inch half moons can be found at the outer edge of kelp beds. Adults, on the other hand, can be found inshore and they can grow to be about 7.5 inches long.

How to Clean Half Moon Fish

  1. Hold the perch by the head and run a fish scaler down its length to remove the scales. Do this on both sides.
  2. Take a sharp filleting knife and insert its tip into the stomach of the perch right near the anus and run the sharp blade right up to the head.
  3. Open the sliced fish and remove the guts with your hands.
  4. Remove the anus by making a V-shaped cut around it.
  5. Rinse the fish with clean water inside and out.
  6. Lay the perch on a flat surface and make sure it’s closed. Slice the fish behind the gills at an angle and till you reach the backbone.
  7. Run the blade under the skin right up to the tail.
  8. Fold the fish in half so that the tail is under the head and the skin is inside the fold.
  9. Use one hand to hold down the tail and use the other to separate the meat with the knife. Remove the ribs as well.

How to Cook Blue Perch

  • Preheat your oven to 450F.
  • Roll each piece of the cut perch in Italian dressing and then into a mixture of flour and cornmeal.
  • Place on a cast iron skillet and pop it in the oven to bake for 30 minutes.
  • Remove from the oven when the edges of the fish turn brown and crispy.

FAQs

Q: What does a halfmoon perch look like?

A: It has a compressed and oval body with a blunt head and a small mouth. The top of the body is dark blue in color which shades to a blue-gray color to the sides and it has a white underbelly

Q: Do fish eat kelp?

A: Herbivorous fish such as the half moon perch eat kelp.

Q: What does a halfmoon perch fish taste like?

A: It has a mild flavor which is not too fishy to eat.

Insider Advice

The blue perch may be a feisty fighter in the water, but its scrumptious taste makes it an excellent catch. There are other surf perch or fish similar to perch you can catch using the methods mentioned in this guide.

If you have stories and tips to share about this, mention them in the comments below.


The Anglers Behind This Article:

Jon Stenstrom
Founder

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