bathyal boyfriend.
Little creatures, enormous feelings.
“b_b” sounds like a conversation conducted by somebody who has watched a little too much deep-sea footage and learned absolutely nothing about sensible relationships. There are chromatophores, questionable courtship rituals, and a bathyal boyfriend whose appeal is apparently not diminished by the obvious warning signs.
The anglerfish is a particularly useful mascot. Down where sunlight does not reach, a light can mean food, danger, company, or all three. Being drawn toward it is not inherently foolish. Deciding the light must love you back is another matter.
A lot of the song’s humour comes from its narrator seeming to know this. The marine-biology jokes are not necessarily hiding innocence or ignorance; they might be the vocabulary of somebody knowingly getting involved anyway. The ridiculousness becomes a form of self-awareness, not quite the same as self-protection.
Not every fish needs to be a metaphor. Some of them are just very strange fish, and that is also important to the song.
Why so much marine biology?
Because the deep ocean is full of creatures doing things no respectable romance novelist would dare submit. They make human behaviour look almost reasonable.
Is the narrator being lured in?
Possibly. But there is also a version where they noticed the lantern, read every warning sign, and swam over anyway. Recognition and resistance are not always the same skill.