For a long stretch of my cooking life, seafood in the oven was hit and miss. I’d use roughly the same method each time – same shelf position, similar oven temperature, similar timing — and still end up with wildly different results. Some nights the fish dried out before I’d noticed anything was wrong. Other nights I’d pull it out at what felt like the right moment and cut into a centre that was still raw. It kept happening, whether I was pan searing or baking, and eventually I started asking chef friends what I was missing.
Nobody gave me a single answer, but the same idea kept surfacing in different words: I was choosing appliances, not thinking about heat. Pan. Oven. Grill. Steam. Pick a method, follow a recipe, watch the cooking time, hope. What none of that accounts for is that a pan, an oven, a grill and a pot of gently moving liquid aren’t interchangeable ways of doing the same job. They move energy into food in completely different ways.
I don’t really cook seafood by choosing a recipe any more. I choose how I want the heat to behave.
Heat Is Not the Same as Temperature
A pan at 200°C, an oven at 200°C and a pot of simmering liquid at around 100°C are not doing the same job, even though two of those numbers match exactly. A pan moves heat through direct contact – fast, concentrated, applied only to whatever surface touches the metal. An oven surrounds food with hot air or moisture (steam or combi oven), a far less efficient carrier of energy than metal or liquid, so the same number on the dial produces a much gentler, slower result. Steam and poaching liquid transfer heat through direct contact with water or vapour, which conducts far more efficiently than air but caps out at a civilised, self-limiting 100°C.
No recipe I’ve ever followed mentions where in the oven to put the fish, and that’s a bigger omission than it sounds. The top shelf sits closer to the grill element, in a hotter, more radiant zone. The bottom shelf sits closer to the base, in a gentler pocket of circulating air. The middle shelf is the compromise most recipes are quietly assuming. Move a fillet up one shelf without changing anything else and you’ve changed the method, not just the position – you’ve turned baking into something closer to grilling.
Grilling Isn’t One Method Either
“Grill” gets used as though it’s a single technique, and it’s really three, each with a different relationship between the food and the heat.
- Oven grill (griller): radiant heat from above, direct and intense, with shelf position doing most of the work – closer to the element means fiercer heat and a shorter margin for error.
- Induction or stovetop grill: contact heat, but only at the ridges. The raised lines touch the surface directly; the valleys between them cook from residual heat and trapped steam rather than the plate itself, which is why you get char lines instead of an even crust and cooking.
- BBQ grill: heat from below or around, open or closed lid, whether gas flame or coals, combined with convection hot air moving up through the grate and, with charcoal, genuine smoke. Fat and moisture dripping onto the heat source adds flare and char that neither of the other two methods produce.
Three methods, three completely different conversations between the food and the heat, all filed under the one word.
Seafood Doesn’t Respond as One Thing
It’s common to hear that seafood cooks quickly, as though that’s one fact covering everything that comes out of the water. It isn’t. Flesh density, fat content, thickness and connective structure change how I apply heat far more than any general rule about seafood as a category.
Scale fish varies enormously on its own. Sand whiting and southern garfish are thin and low in connective tissue, cooking in moments and punishing any hesitation. Barramundi and Ōra King salmon carry more fat and a firmer structure, forgiving a few extra seconds. Murray cod and Nannygai are denser again, handling higher, more sustained heat without falling apart the way a delicate fillet would.
Crustaceans, molluscs, cephalopods and even sea urchin each ask something different again – a prawn heats through almost completely in a minute or two, a mussel is done the instant its shell opens, and sea urchin is often best served with no heat applied at all.
There is no single correct seafood cooking temperature or method. There is only an appropriate relationship between the food and the heat.
Knowing how a fish has been handled changes how I read all of this. I buy from Fair Seafood, Australia’s only 100% fisher-to-consumer traceable seafood supplier, largely because that relationship between food and heat depends on knowing the food. A fillet that left the water yesterday holds its structure under heat differently to one that’s spent a week moving through a longer supply chain – the connective tissue is intact; the fat hasn’t begun to break down. That’s a practical difference in how the flesh behaves, not just a comment on flavour.
That’s where I’ll leave things for Part One – heat sources, and the way different seafood actually meets them. Part Two picks up where the real judgement calls happen: reading the surface against the centre, why I stopped watching the clock, and what happens after the heat is switched off.
The cooking style and cuisine guideline is available — ask the team at Fair Seafood.
Follow along at AncientGrains63 for Part Two, where this same thinking gets applied at the pan, on the grill and everywhere in between.
Next time you slide something into the oven, do you know which shelf you just chose – or just which temperature?
Follow my journey at @AncientGrains63 as I explore how travel expands technique and transforms traceable Australian seafood through understanding traditional methods as each article unpacks a different method, species, and the stories that meet the plate.
