Identification help

[Boj4k]

Trying to identify the various things in my tanks I assume they're everywhere but I can only see them on the glass, also pulled a small fish out of a South Florida canal in the intercostal that I would appreciate any help identifying.
Thanks in advance for any I.Ds

 

[KING KONG]

Trying to identify the various things in my tanks I assume they're everywhere but I can only see them on the glass, also pulled a small fish out of a South Florida canal in the intercostal that I would appreciate any help identifying.
Thanks in advance for any I.Ds

2nd pic might be hydroids which can sting your fishes and your hands too

 

[Cell]

Hydroid medusa. Harmless.