Spearfishing Stats

Taxonomy

Rarity

Pacific sanddab are common along the whole west coast, from the Bering Sea coast of Alaska to the tip of Baja California, and they are abundant enough that party boats out of central California fill sacks with them. The International Union for Conservation of Nature assessed the species in 2019 and lists it as Least Concern.

California places no daily limit on Pacific sanddab and no size limit, which puts it in a small group alongside anchovy, sardine and the smelts. The rule sits in an unusual place in the code. Pacific sanddab is a federal groundfish, grouped with rock sole and 5 other flatfishes as other flatfish, and that normally means the depth restrictions that shut rockfish anglers out of deep water. Sanddab are exempt. The species is open year-round in all depths. The single closure that applies is the Groundfish Exclusion Areas, where it may not be taken or possessed at any time.

Whether the population is doing well is a separate question from whether the fish is protected, and the honest answer is that very little has been published about this species. There is no California stock assessment for it, no diet study surfaced in this research, no spawning season on record, and no named predator.

Regulations

CDFW rules verified 2026-09-07

Seasonality

Edibility

Location

This is a fish of open sand. Pacific sanddab lie flat on soft bottom, usually deeper than 50 feet, and they have been recorded down to about 1,800 feet. Young fish are the exception: they come shallower than 30 feet and move into bays and brackish water. The species is common from Bahia de Sebastian Vizcaino in central Baja California north to British Columbia.

Sanddab are a left-eyed flatfish, which means both eyes sit on the left side of the head and the fish lies on its right. They are the largest of the sanddabs, with a small mouth, plain unmarked fins, and a mottled brown or tan upper side that disappears against sand. The underside is white to pale brown. Freshly caught males carry dull orange spots and blotches that fade quickly. Young fish are light olive green with fine speckling of brown, black and orange, heaviest on the fins.

There is one pattern nobody has explained. Every few years, and particularly in wet winters, enormous numbers of sanddab push into shallow water around San Francisco Bay. A run that started at Pacifica in late November 1997 spread through the Golden Gate to the San Francisco waterfront and up into San Pablo Bay, lasted more than a month, and put 6 to 12 inch fish across the bay bottom in numbers that made catching them almost too easy. The fish bit at dawn and stopped as soon as the sun was fully up. That account comes from a pier angler who has watched the same thing happen since the 1970s, and the reason for it has never been established.

Spearfishing Brief

Pacific sanddab are the reverse of most fish in this Ichthyopedia. The shot is easy and the fish is hard to get to.

Finding one rates a 4, and the difficulty is depth stacked on top of camouflage. Most of the population lies deeper than 50 feet, which is beyond casual breath-hold range, and the fish that are shallow enough are mostly juveniles in bays. On top of that, a sanddab is a flat mottled brown animal lying still on mottled brown sand, often with a dusting of sediment over it. A diver swims over them without seeing them. The compensating fact is that where there is one there are usually many, because these fish carpet the bottom in the right areas.

The shot rates a 2. A flatfish lying on open sand does not flee at distance and does not use structure, so the approach is a slow descent onto a stationary target with nothing to shoot into but sand. What keeps it off a 1 is the target itself. A sanddab is thin, and most are under a foot, so the margin between a clean pin and a shaft that skips off the bottom is narrow. A polespear or a short speargun suits the range. No published California spearfishing account exists for the species, which is taken almost entirely on hook and line from boats, so the gear call here is reasoned from habitat and body shape rather than taken from a written account.

There is no bag limit and no size limit. Anyone taking advantage of that should know how the fishery is normally prosecuted: central California party boats run combination trips in winter, when rockfish are closed, filling up on sanddab and then pulling crab pots on the way in. Monterey boats also catch sanddab at the start of a trip to use as live bait for lingcod.

On the table this fish is the payoff. Pacific sanddab are mild, sweet, soft-textured and low in fat, and they have been a San Francisco restaurant specialty for well over a century. The Tadich Grill, open since 1873, is known for them. The standard preparation is to pan-fry the fish whole and lift the meat off the frame, because a sanddab yields 4 thin fillets and filleting a small one wastes most of the fish.

Deep Dive

The best way to understand a sanddab is to understand what happened to its face.

Flatfishes are not born flat. A young sanddab hatches as an ordinary upright fish with an eye on each side, swimming in open water like any larval fish. Then it changes. One eye migrates across the top of the skull to join the other, the skull itself twists, the body flattens sideways, and the fish settles onto the bottom to spend the rest of its life lying on what used to be its right side. Pacific sanddab are left-eyed, meaning the eyes end up on the left. Some other flatfish families go the other way. This transformation is one of the most extreme rebuilds any vertebrate performs after hatching.

Lying flat solves 2 problems at once. It puts both eyes on the side facing the water, and it turns the whole animal into a shape that can be buried. The mottled brown of the eyed side matches sand, and the white underside never needs a color because nothing sees it.

The measurements for this species disagree, which is worth stating rather than smoothing over. FishBase gives a maximum length of 16.1 inches and a maximum reported age of 9 years. Long-running angling records from California put the maximum at 18.9 inches and around 2 pounds, with fish living to about 13 years. Most sanddab caught from piers are under a foot, so both maximums describe an unusual fish. The all-tackle record recognized by the International Game Fish Association is 1 pound even, caught in Puget Sound in 2017, which tells its own story about how big these get.

What is not known about Pacific sanddab is most of its biology, and that is surprising for a fish that has been commercially landed and eaten in California for more than a century. FishBase records only that reproduction involves distinct pairing. No spawning season is published. There is no fecundity figure, no growth curve, no age at maturity, no diet study, and no named predator. The species is currently gaining commercial importance as other California fisheries tighten, which makes the gap more relevant rather than less: the fishery is growing on top of a stock nobody has measured.

Where to Find Them

Beaches whose habitats match this species

Matched by habitat: a beach is listed when its biome tags overlap this species' biomes.