Tiger Trout, Splake, and Other Hybrids: What They Are and Which States Stock Them
Tiger trout, splake, and other hybrids aren't natural — states raise these sterile crosses on purpose. Here's what they are and which stocking programs use them.
Some of the hardest-fighting fish in a stocking report aren't natural species at all. Tiger trout, splake, and wiper are hybrids that agencies breed in hatcheries on purpose — usually sterile, fast-growing, and stocked to do a job. Here's what they are and where they show up.
What is a tiger trout?
A tiger trout is a hybrid cross between a female brown trout and a male brook trout. The name comes from the bold, maze-like vermiculation across its body. Tiger trout are almost always sterile, which means all their energy goes into growing rather than spawning — so they get big fast and hit lures aggressively. Utah stocks so many that they have their own following; you can browse Utah tiger trout stocking records directly.
What is a splake?
A splake is a cross between a male brook trout and a female lake trout (the name blends "speckled" and "lake"). Unlike most trout hybrids, splake can sometimes reproduce, but stocked splake are managed as a put-grow-take fish. They grow faster than brook trout and tolerate deeper, colder water, which makes them useful in lakes where lake trout would take too long to mature.
Other hybrids you'll see stocked
- Tiger muskellunge — a cross between a muskellunge and a northern pike, stocked as a hard-fighting apex predator. New York stocks them; see New York tiger muskellunge stocking.
- Wiper (hybrid striped bass) — a white bass by striped bass cross stocked in warmwater reservoirs for fast growth and hard fights.
- Palomino / golden rainbow — not a true hybrid but a bright-yellow rainbow strain some states stock as a novelty.
Why states stock hybrids
Three reasons drive most hybrid stocking:
1. Sterility — sterile hybrids won't overpopulate or interbreed with wild and native fish, so agencies can add sport fish without long-term ecological risk.
2. Growth — hybrids often grow faster than either parent, giving anglers bigger fish sooner.
3. Forage control — predatory hybrids like tiger trout and tiger muskie thin out overpopulated small fish (such as Utah chub or stunted panfish), rebalancing a fishery.
Which states stock them
Tiger trout are a western staple — Utah leans on them heavily, and other Mountain West states stock them too. Tiger muskellunge show up in eastern programs like New York's. To see what's actually planted, browse Utah or New York stocked-species pages. And if you want the plain-species picture first, rainbow, brown, and brook trout stocking differences is a good companion read.
Every stocking date, species, and count on StockedWaters is pulled straight from the reporting state agency and dated on the page. See the full source list for the exact agency feeds behind this site.
Frequently asked questions
Are tiger trout real fish or genetically engineered?
They're real, naturally cross-fertile hybrids of brown and brook trout — not genetically engineered. Hatcheries just cross the two species deliberately, and the offspring are usually sterile.
Can you eat tiger trout?
Yes. Tiger trout are eaten like any other trout and are considered good table fare when handled well.
Why are stocked hybrids usually sterile?
Sterility is a feature: it lets agencies add aggressive sport fish without them reproducing, overpopulating, or interbreeding with native species.
What's the difference between a tiger trout and a splake?
A tiger trout is a brown-by-brook cross; a splake is a brook-by-lake-trout cross. Tiger trout are typically sterile, while splake can sometimes reproduce.
Which state is best known for tiger trout?
Utah is the standout — its DWR stocks tiger trout widely, partly to control overpopulated forage fish like Utah chub.