SSI just added a new specialty to its conservation lineup: Invasive Species Management. It’s the tenth environmental program in their continuing education portfolio, it’s open to certified divers aged 16 and up, and it’s built around one of the biggest ecological problems in the Atlantic and Caribbean right now — the lionfish invasion.
Now, it would be easy to look at that and think it’s a course for people who dive Florida, Cozumel and Bonaire, and has nothing to do with a dive shop in the middle of the Sonoran Desert. And you’d be half right. But only half. Let’s talk about what the course actually is, and then let’s talk about why the idea behind it matters even at Lake Pleasant.
What the course actually covers
The Invasive Species Management Specialty is focused squarely on the Indo-Pacific lionfish, which has spread through the north-western Atlantic and the Caribbean where it has essentially no natural predators. Lionfish are voracious — they outcompete native reef fish for prey and eat juvenile reef fish outright — and diver-led culling has become one of the few effective ways to keep local populations in check.
The training pairs classroom knowledge with in-water skills. On the knowledge side you cover lionfish biology, why they’re such a problem, and responsible, humane removal practices. In the water — the program includes open-water dives — you learn to identify the fish, handle those venomous spines safely, and use the specialized capture and containment gear properly. It’s a real specialty certification now, fully built into SSI’s system with a digital student kit and a certification card, rather than the lighter recognition track it used to be.
The important honest note: this is a marine, saltwater course aimed at reef environments. You are not going to go cull lionfish at an Arizona lake. So why are we, a Tucson shop, writing about it?
Why a desert diver should care
Two reasons. The first is practical: a huge number of our divers travel. San Carlos is our backyard, sure, but our crew and our customers also dive the Caribbean, the Gulf, the Pacific — and if you’re the kind of diver who wants to do more than sightsee on those trips, this is a specialty that turns a vacation dive into something that actually helps the reef you’re visiting. It’s a genuinely good thing to have on your card before your next warm-water trip, and it’s the sort of course you’d knock out on location.
The second reason is the bigger one, and it’s the whole spirit of the course rather than the lionfish specifically. Invasive species aren’t a tropical problem. They’re an everywhere problem. And Arizona divers run into ours every single time we get in a lake.
The quagga mussel, our local invader
If you’ve dived Lake Pleasant or Lake Havasu, you’ve seen them, whether you clocked them or not. Quagga mussels have colonized much of the lower Colorado River system, and they’re the reason Arizona has decontamination rules for boats and gear moving between water bodies. They filter the water in a way that reshapes the whole ecosystem, they encrust hard surfaces — including sunken structure divers like to visit — and once they’re established in a lake they are effectively impossible to remove.
That’s the same story as the lionfish, just told in freshwater and without the venomous spines. A species shows up somewhere it doesn’t belong, has no natural check on it, and rewrites the environment. The lionfish specialty is really a course in thinking like that — recognizing an invader, understanding the damage, and knowing that as divers we’re often the people best positioned to notice and to help.
What you can actually do about invasives here
You can’t cull quagga mussels. But you can be part of the solution in the way that matters most for freshwater invasives, which is not spreading them. Clean, drain and dry your gear between different bodies of water — genuinely dry, not damp-in-the-bag. Follow the decontamination guidance at the launch. Don’t move water, plants or anything living from one lake to another. Veligers — the larval stage — are microscopic, and a puddle in the folds of a BCD is all it takes.
It’s unglamorous. It’s also the single most effective thing a recreational diver can do about aquatic invasives, and it applies whether you’re getting out of Lake Pleasant or off a boat in Bonaire.
Interested in the course?
If you’re heading somewhere with a lionfish problem and you want to make that trip count, this is a great specialty to add. It stacks nicely on top of good buoyancy and awareness skills — you’ll want both to hunt responsibly without wrecking the reef you’re trying to protect. Take a look at our continuing education options, and if you want us to line the specialty up around an upcoming trip, come talk to us. We’re an SSI Diamond Instructor Training Center, which means we can run pretty much anything SSI offers.
And next time you’re rinsing your gear after a lake day and thinking about skipping the thorough dry-out — don’t. That’s conservation too, even in the desert.
