Originally published in April 2013, this article has been updated in October 2026 with current rockfish identification resources, detailed NOAA identification methods, and information on identifying Yelloweye Rockfish in B.C.
There are many species of rockfish in the North Pacific, and identifying an unfamiliar fish is not always straightforward. I don’t usually target rockfish directly, but we do catch them while fishing for lingcod and halibut, and if I am considering retaining one, I make a significant effort to make sure I have identified the species correctly. Colour and markings can be useful starting points, but similar species may require a closer look at head spines, fins, mouth size, body shape, and other physical characteristics.
Why Accurate Rockfish Identification Matters
Accurate identification is particularly important if you plan to retain a rockfish. B.C. recreational fishing regulations can differ by species, fishing area, and season, so check the current Fisheries and Oceans Canada recreational fishing regulations for the area you are fishing before retaining your catch. Proper release is also important when a rockfish is not being retained. In B.C., anglers fishing from a vessel are required as a condition of licence to return released rockfish to a similar depth from which they were caught using a descending device. See the FishinBC.COM article Rockfish Release: How to Safely Release Rockfish for more information on barotrauma, descending devices, and properly returning rockfish to depth.
Rockfish Identification Guides
Rockfish occur along much of the Pacific coast, and fisheries agencies in B.C., Alaska, Washington, Oregon, and California publish identification resources for species anglers may encounter in their waters. These regional guides can differ in how they approach identification, so it can be very useful to compare more than one:
- Fisheries and Oceans Canada — B.C. Rockfish Identification
- Alaska Department of Fish and Game — Rockfish Identification
- Washington Department of Fish and Wildlife — Rockfish Identification
- Oregon Department of Fish and Wildlife — Rockfish Identification Key
- California Department of Fish and Wildlife — Rockfish Identification Resources
Fisheries and Oceans Canada also provides a useful B.C. Rockfish Identification Guide. I use it as a cross-check, but I would not rely on matching a fish to a photograph alone. Rockfish can change in appearance as they mature, and similar species can share colours and markings.
For detailed rockfish identification, I find the National Oceanic and Atmospheric Administration (NOAA) Guide to Rockfishes (2000) particularly useful. Rather than relying mainly on photographs, it provides a step-by-step method using colour categories, head-spine strength and position, and additional physical characteristics to separate similar species.
My preference is to work through the guides and examine several identifying characteristics. When an identification matters for retention, I like to double-check my ID by cross-referencing several of the available guides. If separate characteristics and references lead to the same species ID, that provides stronger confirmation. If they disagree, the identification needs another look.
How to Identify a Rockfish
The NOAA guide uses a step-by-step method to narrow the identification by colour category, head-spine strength, the head spines present, and then additional distinguishing characteristics. Some of these details are technical, but they are important when similar species need to be separated.
The following Rockfish ID method is quoted from the Using the Guide section of NOAA’s Guide to Rockfishes (2000). I have kept the methodology intact so the qualifications and distinguishing characteristics NOAA provides are available when identifying a fish. FishinBC.COM editorial notes are shown in italics and square brackets:
USING THE GUIDE
Species are grouped into five color categories: Red, Black, Red/Black, Banded (“Striped” of Hitz, 1965), or White-Spotted Red. Within these categories, species are sorted by head spines strength (weak or strong). Finally, species are grouped together based on the authors’ ideas of externally similar species. However, because species are first sorted by color and head spine strength, the most similar species may not be grouped together.
1. Determine the color category, using the following guidelines:
Red category rockfishes (28 species) possess a light background coloration of orange, yellow, or, most commonly, red. Typically, dark blotches are present on the back and often extend from the base of the dorsal fin to below the lateral line; these blotches may be diffuse or relatively discrete. The infrequent dark phase of some typically red rockfishes is noted under the description of body color. In general, dark red-category rockfishes have a much redder body than black category rockfishes.
Black category rockfishes (18 species) have a predominantly dark background coloration. Most are a uniform dark color, ranging from black to brown with darker blotching or pale areas on the dorsum and lightening to white, gray, or pink ventrally. Others, often more shallow water species, may display strongly contrasting colors such as black and yellow.
Red/black category rockfishes (7 species) possess almost equal proportions of light and dark colors, as the label suggests, which makes selecting either the red or black category difficult. No unifying color pattern is apparent among these fishes; however, a characteristic color combination (e.g., horizontal green striping in greenstriped rockfish, Sebastes elongatus, and the pink pectoral-fin slash in northern rockfish, S. polyspinis) is often sufficient for identification.
Banded category rockfishes (4 species) possess 4-6 discrete vertical bands of dark color (red to black) on a light background of white, pink, or yellow.
White-spotted red category rockfishes (13 species) possess a light colored body with 2-5 pale areas (i.e., spots) above the lateral line, white spots scattered over the body (whitespeckled rockfish, S. moseri), or both (starry rockfish, S. constellatus).
2. Determine head spine strength:
[FishinBC.COM Note: The head spines referred to here are the small spines on the head of the fish around and behind the eyes. Do not confuse these with the prominent spines in the dorsal fin. Page 6 of the NOAA Second Edition includes the official diagram showing the body features and the numbered positions of the eight pairs of head spines used in this identification method.]
After placing the fish in a color category, visually estimate the prominence of the eight pairs of head spines (see page 6 for positions and numbers of spines). Generally if the spines, especially those nearest the orbit (numbers 2-5), are easily visible at about elbow’s length, the spines are considered strong. Otherwise, the spines should be considered weak.
3. Count head spines:
Head spines should be counted to determine which pairs of the eight possible are present. For each species, a diagrammatic dorsal view of the rockfish’s head is provided. A number with a line to the head indicates that the spine is typically present in large juveniles and adults; if a number has no line, the spine is typically absent. A number in parentheses indicates that the spine may be present or absent. Variation in the presence of head spines has not been quantified for most species, thus parentheses may indicate that the spine is typically present but often absent or vice versa. Often spines are lost with body growth, and juveniles typically have more and stronger spines than adults. For example, the dusky rockfish, S. ciliatus, is known for having a smooth head with spines reduced or absent, yet small juveniles possess head spines 1, 2, 4, 5, and 7 that are moderately strong. [FishinBC.COM Note: This scientific name reflects the taxonomy used in the NOAA guide when it was published in 2000. More recent taxonomy distinguishes dusky rockfish (Sebastes variabilis) from dark rockfish (Sebastes ciliatus).] Thus this guide is primarily for adults and large juveniles that have developed the adult morphology. To identify smaller and pelagic juveniles, use the following guides to early life history stages: Matarese et al. (1989) or Moser et al. (1996).
With the information from these three characters, choices should be narrowed to two or three rockfishes. Around most of the figures in the guide, a combination of characters are highlighted that, when present, distinguish the species from all others. Along with these specific characters, two additional features depicted in the figure are often useful in distinguishing similar species: second anal-fin spine length relative to third and mouth size, as reflected in maxilla length relative to the orbit. The second anal-fin spine is noted on the figure when it is always obviously longer than the third. Previous guides have noted finer distinctions in the relative length of the second and third spines but these differences have not been found to be useful for identification. Many of these characters are subjective as well as variable and, therefore, depend on the experience of the user to be used properly. To confirm the identification, use the similar species section to check particular characters. Next to the name of each similar species, characters are listed based on the relative ease of determination and the usefulness of the feature to clearly distinguish between the two species. Finally, check the specimen against other characters provided, such as peritoneum color and shape between the eyes, and habitat information, such as depth and distribution.
The photographs and figures themselves should only be used as a guide to the appearance of the fish. Photographs in species accounts are generally taken from trawl caught specimens with fresh coloration. Line drawings have been drawn from photographs and accurately represent the dark and light patterns and body shape of that specimen. However, many of these features often vary among populations and, in many species, among individuals of a given population.
The NOAA method is detailed, and the instructions above are really intended to be used with the complete guide. The individual species figures, similar-species comparisons, diagrams, and other information in the guide are all part of working through an identification. I find the method particularly useful for making a careful ID, but it requires more than simply matching a fish to a photograph.
If you regularly encounter or retain rockfish, you may want to consider printing a copy of the complete NOAA guide along with the specific identification guide for the province or state where you fish. Having the full references available on the boat makes it much easier to work through an identification using several characteristics and compare similar species.
Yelloweye Rockfish: Why Multiple Identification Checks Matter
Yelloweye Rockfish are a good example of why I don’t recommend identifying rockfish by colour or by matching your fish to a single photograph. This is particularly important in B.C., where Yelloweye Rockfish cannot be retained by recreational anglers under the 2026 regulations.
Adult Yelloweye are often recognizable by their orange to yellow-red colour and bright yellow eyes, but younger fish can look considerably different. Juvenile Yelloweye are darker red and have two light-coloured stripes along their sides. Yelloweye can also be confused with other orange or red rockfish, particularly Vermilion and Canary Rockfish. For a really clear illustration of the potential challenges of identification, check out the California Department of Fish and Wildlife guide comparing Yelloweye, Vermilion, and Canary Rockfish. The guide is intended to help distinguish between these similar-looking species. Although it does help with ID, it also really highlights how difficult and uncertain the correct ID can be.
This is where using several identification characteristics becomes important. Rather than deciding that a fish simply looks like a particular species, check features such as the eyes, head spines and ridges, body markings, mouth and jaw characteristics, fins, and other features described in the identification guides. Depth and geographic distribution can provide additional supporting information.
I also like to compare an unfamiliar fish using more than one reliable identification resource. The detailed NOAA identification method is particularly useful for working through physical characteristics. The DFO B.C. rockfish identification material provides another reference for species found in British Columbia, but I would be cautious about using it as your only identification source. Relying primarily on matching a fish to photographs—particularly photographs that may not clearly show the distinguishing characteristics—can lead to a misidentification.
Positive ID is particularly important when one of the possible species cannot legally be retained. If I cannot confidently identify a rockfish, especially when it resembles a species that is closed to retention, my preference is to take the conservative approach and release it.
If different characteristics or identification resources point to different species, I would consider the identification unresolved rather than simply choosing the species that looks most similar in a photograph.
My Approach With an Uncertain Orange Rockfish
My personal recommendation is to be particularly cautious with any orange rockfish caught in B.C. If the angler cannot confidently identify the fish, I recommend returning it to depth with a rockfish descending device rather than risk retaining a Yelloweye Rockfish that has been misidentified.
That is a deliberately conservative approach rather than a substitute for the fishing regulations. Anglers should still learn the identifying characteristics of the species they may encounter and check the current DFO regulations for their fishing area. But when there is genuine uncertainty, I think releasing the fish is the better choice.
Your Turn: Which Rockfish Species Have You Caught?
With so many rockfish species along the B.C. coast, identifying an unfamiliar fish isn’t always easy. Have you caught a rockfish that was difficult to identify, or do you have any identification tips that have worked well for you? Share your experience in the comments below.
Rockfish are also a common catch while bottom fishing for other species. For more information on those fisheries, see the FishinBC.COM Complete Guide to Lingcod Fishing and Complete Guide to Halibut Fishing.