Interesting Facts About Rockfish

 

  • There are 102 species of rockfish worldwide, and 65 species off of the Pacific Coast.

  • Several species of rockfish can grow close to, or even over, 100 years old – they grow very slowly and do not reproduce until they are at least 10 years old.

  • Age and growth rates are determined by analyzing fish ear bones, called otoliths, in a similar fashion to counting tree rings.

  • Rougheye rockfish are the longest known living fish on earth – the can live over 200 years!

  • The dorsal fin of many rockfishes contains a mild poison, and while not at all fatal, it may lead to an irritated puncture wound.  

  • Many rockfishes are territorial and will defend their territory against perceived threats. 

  • Rockfish often extend their dorsal spines and lean towards an approaching threat as a defensive posture.

  • Egg production differs with each species of rockfish - canary rockfish can produce as many as 1,000,000 eggs at one time.

  • Fertilization is internal for all rockfishes, with the females supplying nutrients internally to the developing larvae. 4 to 5 weeks after fertilization, females give birth to larvae about the size of an eyelash.

  • Research has demonstrated that older females have greater success in producing viable offspring from fertilized eggs.