Fishes

I have been perusing the handy Port Phillip Bay Taxonomy Toolkit.  This identifies everything in the water and there are two fishes I saw the other day which I have now IDed.  This must be like underwater bird watching.  The fishes are Zebra and Blue Warehou.  I'll become an ichthyologist yet. Do ichthyologists have a big year?  What is the group name for a gathering of ichthyologists? A swell of ichthyologists.

A still from above