Capturing the massive sea creature known as the Leviathan is an impossible task, especially when relying on standard fishing methods. Due to the creature's immense power, ordinary physical force and clever traps are completely useless against it [מצודת דוד]. Unlike small, easily managed animals, this giant beast cannot be handled or controlled with ease [מלבי״ם].
To illustrate this reality, the imagery of piercing a catch with traditional fishing tools is used to show how one might normally secure a fish [רש״י, רלב״ג, תקות אנוש, מצודת ציון]. However, there are different understandings regarding the exact nature of these tools. The primary approach among commentators is that the imagery refers to a bent iron hook, shaped much like a curving water plant, which fishermen use to pull their catch out of the water [רש״י, מצודת ציון, ביאור שטיינזלץ].
Others suggest that the tools are not made of metal at all, but are actually simple devices crafted from a natural reed plant or a sharp thorn, typically used to catch much smaller fish [מלבי״ם, אבן עזרא, רלב״ג]. A different perspective offers that these reeds are not used for the actual catching of the sea creature. Instead, they refer to a thick straw reed that fish sellers commonly thread through the nostrils of a caught fish, allowing them to carry it away comfortably [תקות אנוש].