By Peter Southwood - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=31689017 Six gill hagfish Eptatretus hexatrema at the wreck of the Oakburn at Duiker Point on the Cape Peninsula Peter Southwood / CC BY-SA 3.0 https://commons.wikimedia.org/w/index.php?curid=31689017 https://creativecommons.org/licenses/by-sa/3.0/deed.en
By Peter Southwood - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=31689012 Six gill hagfish Eptatretus hexatrema at the wreck of the Oakburn at Duiker Point on the Cape Peninsula Peter Southwood / CC BY-SA 3.0 https://commons.wikimedia.org/w/index.php?curid=31689012 https://creativecommons.org/licenses/by-sa/3.0/deed.en
By User: (WT-shared) Pbsouthwood at wts wikivoyage, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=22710340 Hagfish, Duiker Point, Cape Peninsula. Peter Southwood / CC BY-SA 3.0 https://commons.wikimedia.org/w/index.php?curid=22710340 https://creativecommons.org/licenses/by-sa/3.0/deed.en
https://en.wikipedia.org/wiki/File:Black_hagfish,_Eptatretus_deani_01.jpg English: Photo of man holding many black hagfishes (Eptatretus deani) (slime eels) public domain Photo of man holding many black hagfishes (Eptatretus deani) (slime eels)
The head and teeth of one of the slime fish caught off the California coast
Hagfish are the only animals have a skull but no vertebral column.