''He's an adult male who is with his family,'' Visser told the Northern Advocate from the scene on Tuesday.
''We can hear him calling them, he's making distress calls and we've got to make sure his family is safe too.''
Visser said while the orca had a cray pot attached to the line, disentangling the orca was not straightforward.
''It's around his right pec fin and it may have embedded in his skin so we will have to be careful. It could leave him with an infection which could cause blood poisoning and lead to a slow, painful death. The line is also very short so it's difficult to get a grip on it to cut it off,'' she said.
''So it's not just a simple matter of cutting the line off, it's got to be done very carefully.''
However, despite their best efforts the orca could not be freed.
Visser said it was frustrating as her team had managed to hook the line a few times but the orca managed to wriggle free before it could be cut.
At edition time yesterday it was not known where the orca was.