Unity Slpit my mesh when importing, why?

Ill apologized upfront if this is already answered elsewhere, i couldn’t find anyone having this issue. so i have a ship in blender that I imported into unity but when i did it split the mesh into 2 halves. and put then under the main prefab. its hard to explain so ill attach a screenshot of what I’m talking about.

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the only reason this is a problem for me is be im trying to put a mesh collider on my ship and the and right now only half of the sip can get the collider at a time. thanks for taking the time to read this and also thanks in advance for the help.

OK, i know im not suppose to answer my own questions but i found the problem and wanted to make this as closed. It turns out it was stupid human error. i was saving my object under a different file and was importing an older version of it that hadn’t had the mirror modifier applied to it so unity was seeing two different meshes. thanks everyone for your help. its great to know that this program has such amazing community support.

Try exporting in different formats, or check that your model isn’t split in your 3d modelling software (if you’ve used a mirror/symmetry modifier etc