OH WAIT. You're right. I'm sorry, Americans. You could be referring to "Tuna", the fruit of the Opuntia cacti. It's a common sandwich.

— antifa ombudsman (@Brenderous) 2010.5.19

Found Donut photo (not mine) .. enjoy Bird eating tuna in the backyard #nopal #nopales #pricklypear #tuna #opuntia … https://t.co/gIp8JGJe73

— Dough Nuts (@TheDonutShop) 2015.12.14

Opuntia Cactus (#tuna- #nopal- #chumbera) in Gatton http://t.co/eIKQjOp0v5, QLD, Au. http://t.co/anHjZVqemN. Happy Mother's Day!!

— P @ p s (@Tupacio) 2015.5.11

Photo: Opuntia species with tuna / Desert Botanical Garden, Phoenix http://t.co/f5feXmeJoo

— Dustin Miller (@zoopunkwild) 2014.10.2

Opuntia con tuna, in my mom's backyard. http://t.co/fpZsdVGZ9k

— cmsadler (@cmsadler) 2014.2.9

Planta procesadora de tuna en Lagos de Moreno #México #agricultura #nopal #opuntia http://t.co/Lcmwg90ey1

— Juan Cazorla Godoy (@JuanCazorla) 2013.12.24

Flor de tuna (opuntia) De día se abre, De noche se cierra. http://t.co/Ise3BborZH

— Travel2Travel (@MandarinaGalo) 2013.5.13

Photo: #tuna #opuntia (Taken with Instagram at US #1 Metro Flea Market) http://t.co/d52wo7FC

— Drusilla Bloeme (@DrusillaBloeme) 2012.9.30

サボテンのオプンチア(白桃扇)が増えすぎちゃったんだけど誰かいりませんかね・・・ってこれ持ってくのが大変か http://t.co/vYqTlMtk

— まるターボ (@maru_turbo) 2012.4.16

昨日買ってもらったバニーサボテンちゃん、本当はオプンチア（象牙団扇）っていう品種でバニーカクタスっていう愛称があるらしい。なるほど…！水やり月２、３回でいいのかさすがサボテン。

— ｍｓ (@548xxx) 2011.6.5

#Opuntia microdasys (Bunny Ears, Polka Dot #Cactus, Angel’s Wings, Golden-Bristle) http://t.co/qhFUPtaXEl http://t.co/z0DqehfrnC

— World of Succulents (@SucculentWorld) 2014.4.20

opuntia microdasys world | Flickr - Photo Sharing! #cactus #opuntia --This world is really awesome. https://t.co/CHEGAgqt6K

— para ya (@mecaner1968) 2015.12.19

New member☺️ #cactus #Opuntia #Opuntiamicrodasys #Bunnyears http://t.co/ON7pVwTUoQ

— MiN ⛩️ (@MiN_cacao) 2015.4.28

Columbia Prickly Pear bloom underway. Genus Opuntia. Your choice for species: polyacantha, erinacea, columbiana or Ã. http://t.co/xltu67kFil

— Five Acre Geographic (@5AcreGeographic) 2015.6.16

Opuntia spring growth: O. basilaris ‘Baby Rita’ O. imbricata v. viridiflorus (Santa Fe Cholla) O.... https://t.co/YUzgFBX1KD

— Dustin Miller (@zoopunkwild) 2016.3.27

Komende twee weken #Opuntia vulgaris met vrucht in 19 cm schaal in de aanbieding. @FH_PlantConnect & @FloraXchange https://t.co/91bb8n3vi1

— Kwekerij Ubink B.V. (@KwekerijUbink) 2015.11.18

Me compre el cactus, opuntia microdasy´s rufida.

— Kevin Emiliano (@_Soloaga_) 2013.10.18

#Opuntia microdasys subsp. rufida (Cinnamon #Cactus, Cactus Red Bunny Ears) http://t.co/JFfzI1L0pM http://t.co/XSS7VeeEt0

— World of Succulents (@SucculentWorld) 2014.5.27

@_Opuntia amigaa de mi quore! (Muy gorda bella) jajajja nono todo mas que bien chica!! Sisis espero con ancias!!!!

— Franke (@_Attipico) 2013.8.30

Opuntia And Cereus Cacti from @calvin_789 Customer Review @ Contact Bella Spina Bbm =… https://t.co/JkRo0EU2UR

— Glen Calvin (@calvin_789) 2016.5.3