Original name  
  Check ECoF  
  Current accepted name  
Yes
  Status  
Accepted name
  Status details  
senior synonym, new combination
  Status ref.  
  Etymology of generic noun  
  from ETYFish
hydro-, combining form of hydor (Gr.), water; lagos (Gr.), hare, i.e., “water rabbit,” probably referring to three pairs of tooth plates, which tend to protrude from the mouth like a rabbit’s incisors. (See ETYFish)
  Etymology of specific epithet  
  from ETYFish
In honor of Alexander Collie (1793‒1835), Scottish surgeon-naturalist aboard HMS Blossom, from which holotype was collected; his notes formed the basis of Lay & Bennett’s description. (See ETYFish)
  Link to references  
References using the name as accepted
  Link to other databases  

Note: ETYFish and FishBase started a collaboration to complete the etymology for all valid names of fishes. For the current update, the following groups were completed: hagfishes (Myxini), lampreys (Petromyzonti), chimaeras (Holocephali), and sharks (Squalomorphi). It is a work in progress, so the two websites may not be synchronized.

Scharpf, C. The ETYFish Project, Fish Name Etymology Database. https://www.etyfish.org
Please, report here on etymology issues.